Title of Invention

PHARMACEUTICAL COMPOSITIONS FOR THE PREVENTION AND TREATMENT OF COMPLEX DISEASES AND THEIR DELIVERY BY INSERTABLE MEDICAL DEVICES

Abstract The present invention relates to polyphenol-like compounds that are useful for inhibiting VCAM-1 expression, MCP-1 expression and/or SMC proliferation in a mammal. The disclosed compounds are useful for regulating markers of inflammatory conditions, including vascular inflammation, and for treatment and prevention of inflammatory and cardiovascular diseases and related disease states.
Full Text PHARMACEUTICAL COMPOSITIONS FOR THE PREVENTION AND
TREATMENT OF COMPLEX DISEASES AND THEIR DELIVERY BY
INSERTABLE MEDICAL DEVICES
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. provisional application Ser. No.
60/704,035, filed July 29, 2005, which is incorporated herein by reference in its
entirety.
Technical Field
[001] The present invention relates to polyphenol-like compounds that
are useful for inhibiting VCAM-1 expression, MCP-1 expression and/or SMC
proliferation in a mammal. The disclosed compounds are useful for regulating
markers of inflammatory conditions, including vascular inflammation, and for
treatment and prevention of inflammatory and cardiovascular diseases.
BACKGROUND
[002] Atherosclerosis, restenosis and immune disorders, such as
arthritis, are viewed as inflammatory conditions mediated in large part by an
inflammatory cascade. For instance, the pathogenesis of atherosclerosis or
restenosis occurs in three phases; an inflammatory phase, a cellular proliferative
phase, and a phase of remodeling involving extracellular matrix protein synthesis.
The inflammatory phase is initiated by expression and exhibition of inflammatory
molecules (such as VCAM-1, ICAM-1, or E-selectin) on endothelial cells, resulting
in the recruitment of monocytes from the bloodstream into the sub-endothelial
space. When in the endothelium, monocytes transform into macrophages and
become foam cells as they take up cholesterol. These cholesterol-loaded foam
cells release cytokines such as monocyte-colony stimulating factor and monocyte
chemoattractant protein-1 (MCP-1), instigating the cellular proliferative phase.
Cytokine secretion results in localized monocyte and smooth muscle cell (SMC)
proliferation and recruitment and production of extracellular matrix (the final
phase). During this phase macrophages continue their uptake of cholesterol in
the form of oxidized low-density lipoprotein resulting in swelling of the artery wall.
Continuance of this inflammatory cascade eventually results in the formation of a
plaque consisting of lipid-engorged macrophage-foam cells, smooth muscle cells,
and extracellular matrix (Crowther M (2005) Hematology 1, 436).
-1-

[003] Expression of vascular adhesion moiecule-1 (VCAM-1) on the
surface of endothelial cells for the adhesion and transmigration of monocytes is a
fundamental early event in a wide variety of inflammatory conditions: such as
autoimmune disorders, bacterial and viral infections, asthma, rheumatoid arthritis,
and autoimmune diabetes, in addition to atherosclerosis (Pilewski JM etal. (1995)
Am J Respir Cell Mol Biol 12,1; Ohkawara Y et al. (1995) Am J Respir Cell Mol
Biol 12, 4; Rabb A et al. (1994) Am J Respir Care Med 11,149). Thus, drugs that
inhibit VCAM-1 expression are desirable therapeutics for the treatment of these
conditions.
[004] Chemoattractant factors, such as MCP-1, have been shown to play
a role in monocyte recruitment, proliferation, and migration in a number of
inflammatory conditions and are correlated with a risk for restenosis (Welt FGP et
al. (2002) Arterioscler Thromb Vase Biol. 22,1769). As such, inhibition of MCP-1
expression represents a desirable property of anti-inflammatory therapeutics.
Finally, smooth muscle cell hyperplasia, resulting in tissue remodeling and
decreased organ function is another characteristic of many inflammatory
conditions including atherosclerosis, restenosis, chronic transplant rejection, and
asthma. Therefore, inhibition of the hyperproliferation of SMC is another desirable
property for therapeutic compounds.
[005] To date the most effective means of preventing and treating
atherosclerosis has been via cholesterol-dependant approaches. These include
seeking to lower low-density lipoprotein or raise high density lipoprotein
cholesterol. For example, one method provides compounds useful for regulating
the expression of ApolipoproteinA-l (ApoA-l) (PCT/US2005/038048) a lipoprotein
important for transporting cholesterol.
[006] However, the identification of new inflammatory mediators in the
early pathogenesis of atherosclerosis and restenosis has led to a new focus on a
variety of inflammatory or cholesterol~/ndepencfenf approaches; including the
inhibition of VCAM-1 and MCP-1 expression, or prevention of smooth muscle cell
(SMC) proliferation. Increasing evidence from epidemiological, clinical, and basic
mechanistic studies supports the importance of these inflammatory targets in the
treatment and prevention of inflammatory conditions. Finding drugs that inhibit
-2-

VCAM-1 and/or MCP-1 expression, or inhibit smooth muscle cell proliferation is
desirable.
[007] One class of such compounds thought to play a role in the
prevention of inflammatory conditions are polyphenols. These are common
constituents in of the human diet; they are present in many foods and beverages
of plant origin. Numerous patents and applications describe uses, compositions,
and methods for the prevention, treatment or mitigation of inflammatory and
cardiovascular diseases by the administration of naturally occurring polyphenols
to a patient in need of a pharmaceutical intervention (see, e.g., US/03033578,
US/10696752 ,US 2004 0105817, US 6,900,241, US 6,649,193, US 2002 029088,
US 2003 065505, PCT/09901997/IB, PCT/00000392/AU, PCT/00235153/US,
PCT/US1996/04,028, US 2005 0171163 A1).
[008] It is believed that polyphenols are effective, at least in part, as a
result of their activity on the inhibition of VCAM-1, MCP-1, LDL oxidation, and
smooth muscle cell proliferation (Takahahi R etal. (2005) J Agric Food Chem 53,
1; Fuhrman B et al. (2005) J Nutr 135, 722; Cald UP ef al. (1996) Am J Clin Nutr
63, 403; Tijburg LB et al. (1997) Crit Rev Food Sci Nutr 37, 771; Leiro J et al.
(2004) Int Immunopharmacol 4, 991; Carluccio MA ef al. (2003) Arterioscler
Thromb Vase 23, 622; Ouyang P ef al. (2004) Di Yi Jun Yi Da Xue Xue Bao 24,
975; Hofmann CS et al. (2003) FASEB J17, 702; Araim O et al. (2002) J Vase
Surg 35,1226; El Bedout J et al. (2005) Cardiovasc Res 67, 317). The inverse
relationship between dietary polyphenol consumption and incidence of
cardiovascular diseases is likely associated with their ability to attenuate
biomarkers of oxidative stress, lipidemia and inflammation. Consequently,
naturally occurring polyphenols have the potential to be therapeutically employed.
[009] However, the protective properties of naturally occurring
polyphenols have been difficult to realize for several reasons, including poor
bioavailability and deleterious effects at high concentrations. For instance, the
most abundant and available source of resveratrol for consumers, red wine,
cannot be consumed in therapeutically efficacious quantities on a daily basis
because of the deleterious effects of excessive alcohol consumption.
Furthermore, the use of naturally occurring polyphenols as potential therapies has
also been impeded by an inability to achieve efficacious levels because of poor
-3-

bioavailability. Bioavailability of polyphenols in humans ranges from 1% to 26%
with variability between individuals, and between different polyphenols. In
addition to this, polyphenols differ in how they are absorbed, metabolized, and
excreted. For example, polyphenol flavonoids, such as quercetin, have been
reported to have less than 1% intestinal absorption following oral administration
(Gugler et al. (1975) Eur J Clin Pharm 9, 223). Another complicating factor is the
effect of metabolites of polyphenols. These have been shown to have a negative
influence on the biological activity of the parent compounds. Such metabolites
often differ from the parent compound in terms of toxicity, efficacy, and length of
residence in the plasma. These and other limiting factors, such as poor water
solubility limiting the route of administration, have made it difficult to determine
appropriate dosages for use in humans.
[010] Additionally, several human studies on foods or beverages
containing polyphenols have failed to demonstrate any significant benefit on
primary clinical endpoints, such as oxidative stress, lipidemia, and inflammation.
Of twelve recent studies examining differing sources of polyphenols, six showed
no effect on lipid parameters while the other six showed some improvement
(Manach (2005) Curr Opin Lipidol 16, 77-84). Such contradictory data has limited
the use of polyphenols, despite their many potentially beneficial properties.
[011] Thus, there continues to be a need for novel compounds with
properties like those of polyphenols for the prevention and treatment of
inflammatory conditions. Embodiments of the present invention include
compounds that inhibit VCAM-1 and/or MCP-1 expression and/or inhibit smooth
muscle cell proliferation. The compounds of the present invention also possess
other properties, which enable their use in the treatment or prophylaxis of other
diseases and conditions.
SUMMARY
[012] The methods of invention include administering to a mammal (e.g.,
a human) in need thereof a therapeutically effective amount of a compound of
Formula 1:
-4-


wherein:
X is selected from CRu, CRnR13) CO, CS, O, S, SO, S02) N and NRn,
wherein Rn may be the same or different than R13;
Y is selected from CR12, CR12Ri4, CO, CS, O, S, SO, S02, N and NR12,
wherein R12 may be the same or different than R14;
R-i> R2. R3, R4. R51 R6, R7! R8, R9. R10, R11. R121 R13, Ruand Rare each
independently selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino,
aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl,
halogen, haloalkyl, heteroaryl, heterocyclyl, hydrogen, hydroxyl, ketone, nitro,
phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone, or
two adjacent substituents selected from R-i, R2, R3, R4, R5, Re, R7, Rs> R9>
R10, R11, Ri2, R13, and R14 are connected in a 5 or 6-membered ring to form a
bicyclic aryl, bicyclic heteroaryl or bicyclic heterocyclyl;
each W is independently selected from C and N, wherein if W is N, then p
is 0 and if W is C, then p is 1;
Z1, Z2 and Z3 are each independently selected from a single bond and a
double bond;
wherein if Y is O, then X is not CO;
wherein if at least one W is not N, then
a) X and Y are each CO,
b) X is NR11 and Z2 is a double bond, or
c) two adjacent substituents selected from R5, R6, R7, Rs> and R9 are
connected in a 5 or 6-membered ring to form a bicyclic aryl, bicyclic heteroaryl or
bicyclic heterocyclyl;
and pharmaceutically acceptable salts and hydrates thereof.
-5-

[013] One embodiment provides methods and compositions useful for
inhibiting VCAM-1 expression, MCP-1 expression and/or SMC proliferation in a
mammal.
[014] In certain embodiments, the methods and compositions of the
invention are useful for treating, preventing or mitigating inflammatory conditions
and related disease states, characterized by altered expression of markers of
inflammation such as VCAM-1, MCP-1 and/or SMC proliferation.
[015] One embodiment provides a compound of Formula I:

wherein:
X is selected from CRu, CO, N, NR11 and O;
Y is selected from CR12, CO, and NR-|2;
Ri> R21 R3. R41 R5, R6. R7> Rs> R9, R10, R111 R12, R13. Ri4and Ri7are each
independently selected from alkoxy, alkyl, amino, aminoalkoxy, aminoalkyl,
carboxyalkoxy, halogen, heterocyclyl, heterocyclylalkoxy, heterocyclylalkyl,
hydrogen, hydroxyalkoxy, hydroxyalkyl, and hydroxyl, or
two adjacent substituents selected from R5, R6, R7, Rs and Rg are
connected in a 5 or 6-membered ring to form a bicyclic aryl, bicyclic heteroaryl or
bicyclic heterocyclyl;
each W is independently selected from C and N, wherein if W is N, then p
is 0 and if W is C, then p is 1;
Zi, Z2 and Z3 are each independently selected from a single bond and a
double bond;
wherein if at least one W is not N, then
a) X and Y are each CO, or
b) X is NRn and Z2 is a double bond;
and pharmaceutically acceptable salts and hydrates thereof.
-6-

DETAILED DESCRIPTION
Definitions
[016] The term "aldehyde" or "formyl" as used herein refers to the radical
-CHO.
[017] The term "alkenyl" as used herein refers to an unsaturated straight
or branched hydrocarbon having at least one carbon-carbon double bond, such as
a straight or branched group of 2-22, 2-8, or 2-6 carbon atoms, referred to herein
as (C2-C22)alkenyl, (C2-C8)alkenyl, and (C2-C6)alkenyl, respectively. Exemplary
alkenyl groups include, but are not limited to, vinyl, allyl, butenyl, pentenyl,
hexenyl, butadienyl, pentadienyl, hexadienyl, 2-ethylhexenyl, 2-propyl-2-butenyl,
4-(2-methyl-3-butene)-pentenyl, etc.
[018] The term "alkoxy" as used herein refers to an alkyl group attached to
an oxygen (-O-alkyl-). "Alkoxy" groups also include an alkenyl group attached to
an oxygen ("alkenoxy") or an alkynyl group attached to an oxygen ("alkynoxy")
groups. Exemplary alkoxy groups include, but are not limited to, groups with an
alkyl, alkenyl or alkynyl group of 1-22, 1-8, or 1-6 carbon atoms, referred to herein
as (C-i_C22)alkoxy, (Ci_C8)alkoxy, and (Ci_C6)alkoxy, respectively. Exemplary
alkoxy groups include, but are not limited to methoxy, ethoxy, etc.
[019] The term "alkyl" as used herein refers to a saturated straight or
branched hydrocarbon, such as a straight or branched group of 1-22,1-8, or 1-6
carbon atoms, referred to herein as (Ci-C22)alkyl, (Ci-C8)alkyl, and (Ci-C6)alkyl,
respectively. Exemplary alkyl groups include, but are not limited to, methyl, ethyl,
propyl, isopropyl, 2-methyl-1-propyl, 2-methyl-2-propyl, 2-methyl-1 -butyl, 3-methyl-
1-butyl, 2-methyl-3-butyl, 2,2-dimethyl-1-propyl, 2-methyl-1-pentyl, 3-methyl-1-
pentyl, 4-methyl-1-pentyl, 2-methyl-2-pentyl, 3-methyl-2-pentyl, 4-methyl-2-pentyl,
2,2-dimethyl-1-butyl, 3,3-dimethyl-1-butyl, 2-ethyl-1-butyl, butyl, isobutyl, t-butyl,
pentyl, isopentyl, neopentyl, hexyl, heptyl, octyl, etc.
[020] The term "alkynyl" as used herein refers to an unsaturated straight
or branched hydrocarbon having at least one carbon-carbon triple bond, such as a
straight or branched group of 2-22, 2-8, or 2-6 carbon atoms, referred to herein as
(C2-C22)alkynyl, (C2-C8)alkynyl, and (C2-C6)alkynyl, respectively. Exemplary
alkynyl groups include, but are not limited to, ethynyl, propynyl, butynyl, pentynyl,
-7-

hexynyl, methylpropynyl, 4-methyl-1-butynyl, 4-propyl-2-pentynyl, and 4-butyl-2-
hexynyl, etc.
[021] The term "amide" as used herein refers to a radical of the form
-RaC(0)N(Rb)-, -RaC(0)N(Rb)Rc_, or -C(0)NRbRG, wherein Rb and Rc are each
independently selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino,
aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl,
halogen, haloalkyl, heteroaryl, heterocyclyl, hydrogen, hydroxy I, ketone, nitro,
phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone.
The amide can be attached to another group through the carbon, the nitrogen, Rb,
Rc, or Ra. The amide also may be cyclic, for example Rb and Rc, Ra and Rb, or
Ra and Rc may be joined to form a 3- to 12-membered ring, such as a 3- to 10-
membered ring or a 5- to 6-membered ring. The term "amide" encompasses
groups such as sulfonamide, urea, carbamate, carbamic acid, and cyclic versions
thereof. The term "amide" also encompasses an amide group attached to a
carboxy group, e.g., -amide-COOH or salts such as -amide-COONa, etc, an
amino group attached to a carboxy group, e.g., -amino-COOH or salts such as -
amino-COONa, etc.
[022] The term "amine" or "amino" as used herein refers to a radical of the
form -NRdRe, -N(R and Rf are
independently selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino,
aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl,
halogen, haloalkyl, heteroaryl, heterocyclyl, hydrogen, hydroxyl, ketone, nitro,
phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone.
The amino can be attached to the parent molecular group through the nitrogen,
Rd, Re or Rf. The amino also may be cyclic, for example any two of Ra, Rb, and
Rc may be joined together or with the N to form a 3- to 12-membered ring, e.g.,
morpholino or piperidinyl. The term amino also includes the corresponding
quaternary ammonium salt of any amino group, e.g., -[N(R Exemplary amino groups include aminoalkyl groups, wherein at least one of R,
Re, or Rf is an alkyl group.
-8-

[023] The term "aminoalkoxy" as used herein refers to an amino group
attached to an alkoxy group.
[024] The term "aminoalkyl" as used herein refers to an amino group
attached to an alkyl group.
[025] The term "aryl" as used herein refers to a mono-, bi-, or other multi-
carbocyclic, aromatic ring system. The aryl group can optionally be fused to one
or more rings selected from aryls, cycloalkyls, and heterocyclyls. The aryl groups
of this invention can be substituted with groups selected from alkoxy, aryloxy,
alkyl, alkenyi, alkynyl, amide, amino, aryl, arylalkyl, carbamate, carboxy, cyano,
cycloalkyl, ester, ether, formyl, halogen, haloalkyl, heteroaryl, heterocyclyl,
hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid,
sulfonamide and thioketone. Exemplary aryl groups include, but are not limited to,
phenyl, tolyl, anthracenyl, fluorenyl, indenyl, azulenyl, and naphthyl, as well as
benzo-fused carbocyclic moieties such as 5,6,7,8-tetrahydronaphthyl. Exemplary
aryl groups also include, but are not limited to a monocyclic aromatic ring system,
wherein the ring comprises 6 carbon atoms, referred to herein as "(C6)aryl."
[026] The term "arylalkyl" as used herein refers to an aryl group having at
least one alkyl substituent, e.g. -aryl-alkyk Exemplary arylalkyl groups include,
but are not limited to, arylalkyls having a monocyclic aromatic ring system,
wherein the ring comprises 6 carbon atoms, referred to herein as "(C6)arylalkyl."
[027] The term "aryloxy" as used herein refers to an aryl group attached to
an oxygen atom. Exemplary aryloxy groups include, but are not limited to,
aryloxys having a monocyclic aromatic ring system, wherein the ring comprises 6
carbon atoms, referred to herein as "(C6)aryloxy."
[028] The term "arylthio" as used herein refers to an aryl group attached to
an sulfur atom. Exemplary arylthio groups include, but are not limited to, arylthios
having a monocyclic aromatic ring system, wherein the ring comprises 6 carbon
atoms, referred to herein as "(C6)arylthio."
[029] The term "arylsulfonyl" as used herein refers to an aryl group
attached to a sulfonyl group, e.g., -S(O)2-aryl-. Exemplary arylsulfonyl groups
include, but are not limited to, arylsulfonyls having a monocyclic aromatic ring
system, wherein the ring comprises 6 carbon atoms, referred to herein as
"(C6)arylsulfonyl."
-9-

[030] The term "benzyl" as used herein refers to the group -CH2-phenyl.
[031] The term "bicyclic aryl" as used herein refers to an aryl group fused
to another aromatic or non-aromatic carbocylic or heterocyclic ring. Exemplary
bicyclic aryl groups include, but are not limited to, naphthyl or partly reduced forms
thereof, such as di-, tetra-, or hexahydronaphthyl.
[032] The term "bicyclic heteroaryl" as used herein refers to a heteroaryl
group fused to another aromatic or non-aromatic carbocylic or heterocyclic ring.
Exemplary bicyclic heteroaryls include, but are not limited to, 5,6 or 6,6-fused
systems wherein one or both rings contain heteroatoms. The term "bicyclic
heteroaryl" also encompasses reduced or partly reduced forms of fused aromatic
system wherein one or both rings contain ring heteroatoms. The ring system may
contain up to three heteroatoms, independently selected from oxygen, nitrogen, or
sulfur. The bicyclic system may be optionally substituted with one or more groups
selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino, aryl, arylalkyl,
carbamate, carbbxy, cyano, cycloalkyl, ester, ether, formyl, halogen, haloalkyl,
heteroaryl, heterocyclyl, hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl,
sulfonyl, sulfonic acid, sulfonamide and thioketone. Exemplary bicyclic
heteroaryls include, but are not limited to, quinazolinyl, benzothiophenyl,
benzoxazolyl, benzimidazolyl, benzothiazolyl, benzofuranyl, indolyl, quinolinyl,
isoquinolinyl, phthalazinyl, benzotriazolyl, benzopyridinyl, and benzofuranyl.
[033] The term "carbamate" as used herein refers to a radical of the form
-RgOC(0)N(Rh)-, -RgOC(0)N(Rh)Rj-, or -OC(0)NRhRj, wherein Rg> Rf, and Rj
are each independently selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl,
amide, amino, aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether,
formyl, halogen, haloalkyl, heteroaryl, heterocyclyl, hydrogen, hydroxyl, ketone,
nitro, phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and
thioketone. Exemplary carbamates include, but are not limited to, arylcarbamates
or heteroaryl carbamates, e.g. wherein at least one of Rg Rf, and Rj are
independently selected from aryl or heteroaryl, such as pyridine, pyridazine,
pyrimidine, and pyrazine.
[034] The term "carbonyl" as used herein refers to the radical -C(O)-.
[035] The term "carboxy" as used herein refers to the radical -COOH or its
corresponding salts, e.g. -COONa, etc. The term carboxy also includes
-10-

"carboxycarbonyl," e.g. a carboxy group attached to a carbonyl group, e.g., -C(O)-
COOH or salts such as -C(0)-COONa, etc.
[036] The term "carboxyalkoxy" as used herein refers to the radical
-COOH or its corresponding salts, e.g. -COONa, etc., attached to an alkoxy
group.
[037] The term "cyano" as used herein refers to the radical -CN.
[038] The term "cycloalkoxy" as used herein refers to a cycloalkyl group
attached to an oxygen.
[039] The term "cycloalkyl" as used herein refers to a monovalent
saturated or unsaturated cyclic, bicyclic, or bridged bicyclic hydrocarbon group of
3-12 carbons, or 3-8 carbons, referred to herein as "(C3-C8)cycloalkyl," derived
from a cycloalkane. Exemplary cycloalkyl groups include, but are not limited to,
cyclohexanes, cyclohexenes, cyclopentanes, and cyclopentenes. Cycloalkyl
groups may be substituted with alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide,
amino, aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl,
halogen, haloalkyl, heteroaryl, heterocyclyl, hydroxyl, ketone, nitro, phosphate,
sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone. Cycloalkyl
groups can be fused to other cycloalkyl, aryl, or heterocyclyl groups.
[040] The term "dicarboxylic acid" as used herein refers to a group
containing at least two carboxylic acid groups such as saturated and unsaturated
hydrocarbon dicarboxylic acids and salts thereof. Exemplary dicarboxylic acids
include alkyl dicarboxylic acids. Dicarboxylic acids may be substituted with
alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino, aryl, arylalkyl, carbamate,
carboxy, cyano, cycloalkyl, ester, ether, formyl, halogen, haloalkyl, heteroaryl,
heterocyclyl, hydrogen, hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl,
sulfonyl, sulfonic acid, sulfonamide and thioketone. Dicarboxylic acids include,
but are not limited to succinic acid, glutaric acid, adipic acid, suberic acid, sebacic
acid, azelaic acid, maleic acid, phthalic acid, aspartic acid, glutamic acid, malonic
acid, fumaric acid, (+)/(-)-malic acid, (+)/(-) tartaric acid, isophthalic acid, and
terephthalic acid. Dicarboxylic acids further include carboxylic acid derivatives
thereof, such as anhydrides, imides, hydrazides, etc., for example, succinic
anhydride, succinimide, etc.
-11-

[041] The term "ester" refers to a radical having the structure -C(0)0-,
-C(0)0-Rj_, -R| Rj and R[ alkynyl, amide, amino, aryl, arylalkyl, cycloalkyl, ether, formyl, haloalkyl, halogen,
heteroaryl, heterocyclyl, ketone, phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid
and thioketone. R| may be cyclic, for example the carbon atom and Rj, the oxygen atom and R, or
Rj and R| include, but are not limited to, alkyl esters wherein at least one of Rj or Rk is alkyl,
such as -alkyl-C(0)-0- -C(0)-0-alkyl-, -alkyl-C(0)-0-alkyl-, etc. Exemplary
esters also include aryl or heteoraryl esters, e.g. wherein at least one of Rj or Rk
is a heteroaryl group such as pyridine, pyridazine, pyrimidine and pyrazine, such
as a nicotinate ester. Exemplary esters also include reverse esters having the
structure -R| Exemplary reverse esters include succinate, D-argininate, L-argininate, L-lysinate
and D-lysinate. Esters also include carboxylic acid anhydrides and acid halides.
[042] The term "ether" refers to a radical having the structure -R|0-Rm_,
where R| and Rm can independently be alkyl, alkenyl, alkynyl, aryl, cycloalkyl,
heterocyclyl, or ether. The ether can be attached to the parent molecular group
through R| or Rm. Exemplary ethers include, but are not limited to, alkoxyalkyl
and alkoxyaryl groups. Ethers also includes polyethers, e.g., where one or both of
R| and Rm are ethers.
[043] The terms "halo" or "halogen" or "Hal" as used herein refer to F, CI,
Br, or I.
[044] The term "haloalkyl" as used herein refers to an alkyl group
substituted with one or more halogen atoms. "Haloalkyls" also encompass alkenyl
or alkynyl groups substituted with one or more halogen atoms.
[045] The term "heteroaryl" as used herein refers to a mono-, bi-, or multi-
cyclic, aromatic ring system containing one or more heteroatoms, for example 1 to
3 heteroatoms, such as nitrogen, oxygen, and sulfur. Heteroaryls can be
substituted with one or more substituents including alkoxy, aryloxy, alkyl, alkenyl,
-12-

alkynyl, amide, amino, aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester,
ether, formyl, halogen, haloalkyl, heteroaryl, heterocyclyl, hydroxyl, ketone, nitro,
phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone.
Heteroaryls can also be fused to non-aromatic rings. Illustrative examples of
heteroaryl groups include, but are not limited to, pyridinyl, pyridazinyl, pyrimidyl,
pyrazyl, triazinyl, pyrrolyl, pyrazolyl, imidazolyl, (1,2,3,)- and (1,2,4)-triazolyl,
pyrazinyl, pyrimidilyl, tetrazolyl, furyl, thienyl, isoxazolyl, thiazolyl, furyl, phenyl,
isoxazolyl, and oxazolyl. Exemplary heteroaryl groups include, but are not limited
to, a monocyclic aromatic ring, wherein the ring comprises 2 to 5 carbon atoms
and 1 to 3 heteroatoms, referred to herein as "(C2-C5)heteroaryl,"
[046] The terms "heterocycle," "heterocyclyl," or "heterocyclic" as used
herein refer to a saturated or unsaturated 3-, 4-, 5-, 6- or 7-membered ring
containing one, two, or three heteroatoms independently selected from nitrogen,
oxygen, and sulfur. Heterocycles can be aromatic (heteroaryls) or non-aromatic.
Heterocycles can be substituted with one or more substituents including alkoxy,
aryloxy, alkyl, alkenyl, alkynyl, amide, amino, aryl, arylalkyl, carbamate, carboxy,
cyano, cycloalkyl, ester, ether, formyl, halogen, haloalkyl, heteroaryl, heterocyclyl,
hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid,
sulfonamide and thioketone.
[047] Heterocycles also include bicyclic, tricyclic, and tetracyclic groups in
which any of the above heterocyclic rings is fused to one or two rings
independently selected from aryls, cycloalkyls, and heterocycles. Exemplary
heterocycles include acridinyl, benzimidazolyl, benzofuryl, benzothiazolyl,
benzothienyl, benzoxazolyl, biotinyl, cinnolinyl, dihydrofuryl, dihydroindolyl,
dihydropyranyl, dihydrothienyl, dithiazolyl, furyl, homopiperidinyl, imidazolidinyl,
imidazolinyl, imidazolyl, indolyl, isoquinolyl, isothiazolidinyl, isothiazolyl,
isoxazolidinyl, isoxazolyl, morpholinyl, oxadiazolyl, oxazolidinyl, oxazolyl,
piperazinyl, piperidinyl, pyranyl, pyrazolidinyl, pyrazinyl, pyrazolyl, pyrazolinyl,
pyridazinyl, pyridyl, pyrimidinyl, pyrimidyl, pyrrolidinyl, pyrrolidin-2-onyl, pyrrolinyl,
pyrrolyl, quinolinyl, quinoxaloyl, tetrahydrofuryl, tetrahydroisoquinolyl,
tetrahydropyranyl, tetrahydroquinolyl, tetrazolyl, thiadiazolyl, thiazolidinyl, thiazolyl,
thienyl, thiomorpholinyl, thiopyranyl, and triazolyl.
-13-

[048] The term "heterocyclylalkyl" as used herein refers to a heterocyclyl
attached to an alkyl group.
[049] The term "heterocyclylalkoxy" as used herein refers to a heterocyclyl
attached to an alkoxy group.
[050] The terms "hydroxy" and "hydroxyl" as used herein refers to the
radical -OH.
[051] The term "hydroxyalkoxy" as used herein refers to a hydroxy radical
attached to an alkoxy group.
[052] The term "hydroxyalkyl" as used herein refers to a hydroxy radical
attached to an alkyl group.
[053] The term "hydroxyaryl" as used herein refers to a hydroxy radical
attached to an aryl group.
[054] The term "ketone" as used herein refers to a radical having the
structure -C(0)-Rn (such as acetyl, -C(0)CH3) or -Rn_C(0)-R0_. The ketone can
be attached to another group through Rn or R0. Rn or R0 can be alkyl, alkenyl,
alkynyl, cycloalkyl, heterocyclyl or aryl, or Rn or R0 can be joined to form a 3- to
12-membered ring.
[055] The term "monoester" as used herein refers to an analogue of a
dicarboxylic acid wherein one of the carboxylic acids is functionalized as an ester
and the other carboxylic acid is a free carboxylic acid or salt of a carboxylic acid.
Examples of monoesters include, but are not limited to, to monoesters of succinic
acid, glutaric acid, adipic acid, suberic acid, sebacic acid, azelaic acid, oxalic and
maleic acid.
[056] The term "nitro" as used herein refers to the radical -NO2.
[057] The term "perfluoroalkoxy" as used herein refers to an alkoxy group
in which all of the hydrogen atoms have been replaced by fluorine atoms.
[058] The term "perfluoroalkyl" as used herein refers to an alkyl group in
which all of the hydrogen atoms have been replaced by fluorine atoms.
Exemplary perfluoroalkyl groups include, but are not limited to, Ci_5 perfluoroalkyl,
such as trifluoromethyl, etc.
[059] The term "perfluorocycloalkyl" as used herein refers to a cycloalkyl
group in which all of the hydrogen atoms have been replaced by fluorine atoms.
-14-

[060] The term "phenyl" as used herein refers to a 6-membered
carbocyclic aromatic ring. The phenyl group can also be fused to a cyclohexane
or cyclopentane ring. Phenyl can be substituted with one or more substituents
including alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino, aryl, arylalkyl,
carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl, halogen, haloalkyl,
heteroaryl, heterocyclyl, hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl,
sulfonyl, sulfonic acid, sulfonamide and thioketone.
[061] The term "phosphate" as used herein refers to a radical having the
structure -OP(0)02-, -RxOP(0)02-, -OP(0)02Ry-, or -RxOP(0)02Ry-, wherein Rx
and Ry can be alkyl, alkenyl, alkynyl, alkoxy, amide, amino, aryl, aryloxy, carboxy,
cyano, cycloalkyl, ester, ether, halogen, heterocyclyl, hydrogen, hydroxy, ketone,
nitro, sulfonate, sulfonyl, and thio.
[062] The term "sulfide" as used herein refers to the radical having the
structure RZS-, where Rz can be alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide,
amino, aryl, arylalkyl, carbamate, carboxy, cycloalkyl, ester, ether, formyl,
haloalkyl, heteroaryl, heterocyclyl, and ketone. The term "alkylsulfide" as used
herein refers to an alkyl group attached to a sulfur atom.
[063] The term "sulfinyl" as used herein refers to a radical having the
structure -S(0)0-, -RpS(0)0-, -RpS(0)ORq-, or -S(0)ORq-, wherein Rp and RS can
be alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino, aryl, arylalkyl, cycloalkyl,
ester, ether, formyl, halogen, haloalkyl, heteroaryl, heterocyclyl, hydroxyl, ketone,
nitro, phosphate, sulfide, sulfonyl, sulfonic acid, sulfonamide and thioketone.
Exemplary sulfinyl groups include, but are not limited to, alkylsulfinyls wherein at
least one of Rp or Rq is alkyl, alkenyl or alkynyl.
[064] The term "sulfonamide" as used herein refers to a radical having the
structure -(Rr)-N-S(0)2-Rs- or-Rt(Rr)-N-S(0)2-Rs, where Rt, Rr, and Rs can be,
for example, hydrogen, alkyl, alkenyl, alkynyl, aryl, cycloalkyl, and heterocyclyl.
Exemplary sulfonamides include alkylsulfonamides (e.g., where Rs is alkyl),
arylsulfonamides (e.g., where Rsis aryl), cycloalkyl sulfonamides (e.g., where Rs
is cycloalkyl), and heterocyclyl sulfonamides (e.g., where Rs is heterocyclyl), etc.
[065] The term "sulfonate" as used herein refers to the radical -OSO3".
Sulfonate includes salts such as -OS03Na, -OS03K, etc. and the acid -OS03H
-15-

[066] The term "sulfonic acid" refers to the radical -S03H~ and its
corresponding salts, e.g. -SO3K-, -SCNa--.
[067] The term "sulfonyl" as used herein refers to a radical having the
structure RUSO2-, where Ru can be alkyl, alkenyl, alkynyl, amino, amide, aryl,
cycloalkyl, and heterocyclyl, e.g., alkylsulfonyl. The term "alkylsulfonyl" as used
herein refers to an alkyl group attached to a sulfonyl group. "Alkylsulfonyl" groups
can optionally contain alkenyl or alkynyl groups.
[068] The term "thioketone" refers to a radical having the structure
-RV_C(S)-RW_. The ketone can be attached to another group through Rv or Rw.
Rv or Rw can be alkyl, alkenyl, alkynyl, cycloalkyl, heterocyclyl or aryl, or Rv or
Rw can be joined to form a 3- to 12-membered ring.
[069] "Alkyl," "alkenyl," and "alkynyl" groups, collectively referred to as
"saturated and unsaturated hydrocarbons," and "alkoxy" groups can be substituted
with or interrupted by at least one group selected from alkoxy, aryloxy, alkyl,
alkenyl, alkynyl, amide, amino, aryl, arylalkyl, carbamate, carboxy, cyano,
cycloalkyl, ester, ether, formyl, halogen, haloalkyl, heteroaryl, heterocyclyl,
heterocyclyloxy, hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl, sulfonyl,
sulfonic acid, sulfonamide, thioketone, and N.
[070] As used herein, a "suitable substituent" refers to a group that does
not nullify the synthetic or pharmaceutical utility of the compounds of the invention
or the intermediates useful for preparing them. Examples of suitable substituents
include, but are not limited to: C1-22, C-i_8, and C1-6 alkyl, alkenyl or alkynyl; C-i_6
aryl, C2-5 heteroaryl; C3_7 cycloalkyl; C-i-22, C-i-s, and Ci-6 alkoxy; C6 aryloxy; -CN;
-OH; oxo; halo, carboxy; amino, such as -NH(Ci-22, Ci.8) or d-6 alkyl), -N((C-i-22,
C-i-s, and C1-6 alkyl)2, -NH((C6)aryl), or -N((C6)aryl)2; formyl; ketones, such as
-CO(Ci-22, C-i-s, and Ci_6 alkyl), -CO((C6 aryl) esters, such as -C02(Ci.22, C-i-8, and
C1-6 alkyl) and -C02 (C6 aryl); and heterocyclyl. One of skill in art can readily
choose a suitable substituent based on the stability and pharmacological and
synthetic activity of the compound of the invention.
[071] The term "pharmaceutically acceptable carrier" as used herein refers
to any and all solvents, dispersion media, coatings, isotonic and absorption
delaying agents, and the like, that are compatible with pharmaceutical
-16-

administration. The use of such media and agents for pharmaceutical active
substances is well known in the art. The compositions may also contain other
active compounds providing supplemental, additional, or enhanced therapeutic
functions.
[072] The term "pharmaceutically acceptable composition" as used herein
refers to a composition comprising at least one compound as disclosed herein
formulated together with one or more pharmaceutically acceptable carriers.
[073] The term "pharmaceutically acceptable prodrugs" as used herein
represents those prodrugs of the compounds of the present invention that are,
within the scope of sound medical judgment, suitable for use in contact with the
tissues of humans and lower animals without undue toxicity, irritation, allergic
response, commensurate with a reasonable benefit / risk ratio, and effective for
their intended use, as well as the zwitterionic forms, where possible, of the
compounds of the invention. A discussion is provided in Higuchi et al., "Pro-drugs
as Novel Delivery Systems," ACS Symposium Series, Vol. 14, and in Roche, E.B.,
ed. Bioreversible Carriers in Drug Design, American Pharmaceutical Association
and Pergamon Press, 1987, both of which are incorporated herein by reference.
[074] In one embodiment, pharmaceutically acceptable prodrugs refer to
a compound that is metabolized, for example hydrolyzed or oxidized, in the host to
form the compound of the present invention. Typical examples of prodrugs include
compounds that have biologically labile protecting groups on a functional moiety
of the active compound. Prodrugs include compounds that can be oxidized,
reduced, aminated, deaminated, hydroxylated, dehydroxylated, hydrolyzed,
dehydrolyzed, alkylated, dealkylated, acylated, deacylated, phosphorylated,
dephosphorylated to produce the active compound.
[075] Any of the compounds described herein can be administered as a
prodrug to increase the activity, bioavailability, stability or otherwise alter the
properties of the compound. A number of prodrug ligands are known. In general,
alkylation, acylation or other lipophilic modification of the compound will increase
the stability of Formula 1. Examples of substituent groups that can replace one or
more hydrogens on the compound are alkyl, aryl, steroids, carbohydrates,
including sugars, 1,2-diacylglycerol and alcohols. Many are described in R. Jones
-17-

and N. Bischofberger, Antiviral Research, 27 (1995) 1-17. Any of these can be
used in combination with the disclosed compounds to achieve a desired effect.
[076] The term "pharmaceutically acceptable salt(s)" or "complexes" refers
to salts of acidic or basic groups that may be present in compounds used in the
present compositions. In one embodiment, these salts retain the desired
biological activity of the compounds of the present invention and exhibit minimal
undesired toxicological effects. Examples of pharmaceutically acceptable salts
are organic acid addition salts formed with acids, which form a physiological
acceptable anion, for example, tosylate, methanesulfonate, acetate, citrate,
malonate, tartarate, succinate, benzoate, ascorbate, .alpha.-ketoglutarate and
.alpha.-glycerophosphate. Suitable inorganic salts may also be formed, including,
sulfate, nitrate, bicarbonate and carbonate salts. Alternatively, the
pharmaceutically acceptable salts may be made with sufficiently basic compounds
such as an amine with a suitable acid affording a physiologically acceptable anion.
Alkali metal (for example, sodium, potassium or lithium) or alkaline earth metal (for
example calcium) salts of carboxylic acids can also be made.
[077] Nonlimiting examples of such salts are (a) acid addition salts
formed with inorganic acids (for example, hydrochloric acid, hydrobromic acid,
sulfuric acid, phosphoric acid, nitric acid, and the like), and salts formed with
organic acids such as acetic acid, oxalic acid, tartaric acid, succinic acid, malic
acid, ascorbic acid, benzoic acid, tannic acid, pamoic acid, alginic acid,
polyglutamic acid, naphthalenesulfonic acid, naphthalenedisulfonic acid, and
polygalcturonic acid; (b) base addition salts formed with metal cations such as
zinc, calcium, bismuth, barium, magnesium, aluminum, copper, cobalt, nickel,
cadmium, sodium, potassium, and the like, or with a cation formed from ammonia,
N,N-dibenzylethylenediamine, D-glucosamine, tetraethylammonium, or
ethylenediamine; or (c) combinations of (a) and (b); e.g., a zinc tannate salt or the
like. Also included in this definition are pharmaceutically acceptable quaternary
salts known by those skilled in the art, which specifically include the quaternary
ammonium salt of the formula -NR.sup.+A.sup.-, wherein R is as defined above
and A is a counterion, including chloride, bromide, iodide, --O-alkyl,
toluenesulfonate, methylsulfonate, sulfonate, phosphate, or carboxylate (such as
-18-

benzoate, succinate, acetate, glycolate, maleate, malate, citrate, tartrate,
ascorbate, benzoate, cinnamoate, mandeloate, benzyloate, and diphenylacetate).
[078] Particular FDA-approved salts can be conveniently divided
between anions and cations (Approved Drug Products with Therapeutic
Equivalence Evaluations (1994) U.S. Department of Health and Human Services,
Public Health Service, FDA, Center for Drug Evaluation and Research, Rockville,
Md; L. D. Bighley, S. M. Berge and D. C. Monkhouse, Salt Forms of Drugs and
Absorption, Encyclopedia of Pharmaceutical Technology, Vol. 13, J. Swarbridk
and J. Boylan, eds., Marcel Dekker, NY (1996)). Among the approved anions
include aceglumate, acephyllinate, acetamidobenzoate, acetate,
acetylasparaginate, acetylaspartate, adipate, aminosalicylate,
anhydromethylenecitrate, ascorbate, aspartate, benzoate, besylate, bicarbonate,
bisulfate, bitartrate, borate, bromide, camphorate, camsylate, carbonate, chloride,
chlorophenoxyacetate, citrate.closylate, cromesilate, cyclamate, dehydrocholate,
dihydrochloride, dimalonate, edentate, edisylate, estolate, esylate, ethylbromide,
ethylsulfate, fendizoate, fosfatex, fumarate, gluceptate, gluconate, glucuronate,
glutamate, glycerophosphate, glysinate, glycollylarsinilate, glycyrrhizate,
hippurate, hemisulfate, hexylresorcinate, hybenzate, hydrobromide, hydrochloride,
hydroiodid, hydroxybenzenesulfonate, hydroxybenzoate, hydroxynaphthoate,
hyclate, iodide, isethionate, lactate, lactobionate, lysine, malate, maleate,
mesylate, methylbromide, methyliodide, methylnitrate, methylsulfate,
monophosadenine, mucate, napadisylate, napsylate, nicotinate, nitrate, oleate,
orotate, oxalate, oxoglurate, pamoate, pantothenate, pectinate,
phenylethylbarbiturate, phosphate, pacrate, plicrilix, polistirex, polygalacturonate,
propionate, pyridoxylphosphate, saccharinate, salicylate, stearate, succinate,
stearylsulfate, subacetate, succinate, sulfate, subsalicylate, tannate, tartrate,
teprosilate, terephthalate, teoclate, thiocyante, tidiacicate, timonacicate, tosylate,
triethiodide, triethiodide, undecanoate, and xinafoate. The approved cations
include ammonium, benethamine, benzathine, betaine, calcium, carnitine,
clemizole, chlorcyclizine, choline, dibenylamine, diethanolamine, diethylamine,
diethylammonium diolamine, eglumine, erbumine, ethylenediamine, heptaminol,
hydrabamine, hydroxyethylpyrrolidone, imadazole, meglumine, olamine,
piperazine, 4-phenylcyclohexylamine, procaine, pyridoxine, triethanolamine, and
-19-

tromethamine. Metallic cations include, aluminum, bismuth, calcium lithium,
magnesium, neodymium, potassium, rubidium, sodium, strontium and zinc.
[079] A particular class of salts can be classified as organic amine salts.
The organic amines used to form these salts can be primary amines, secondary
amines or tertiary amines, and the substituents on the amine can be straight,
branched or cyclic groups, including ringed structures formed by attachment of
two or more of the amine substituents. Of particular interest are organic amines
that are substituted by one or more hydroxyalkyl groups, including alditol or
carbohydrate moieties. These hydroxy substituted organic amines can be cyclic or
acyclic, both classes of which can be primary amines, secondary amines or
tertiary amines. A common class of cyclic hydroxy substituted amines is the amino
sugars.
[080] The compounds of the disclosure may contain one or more chiral
centers and/or double bonds and, therefore, exist as stereoisomers, such as
geometric isomers, enantiomers or diastereomers. The term "stereoisomers"
when used herein consist of all geometric isomers, enantiomers or diastereomers.
These compounds may be designated by the symbols "R" or "S," depending on
the configuration of substituents around the stereogenic carbon atom. The
present invention encompasses various stereoisomers of these compounds and
mixtures thereof. Stereoisomers include enantiomers and diastereomers.
Mixtures of enantiomers or diastereomers may be designated "(±)" in
nomenclature, but the skilled artisan will recognize that a structure may denote a
chiral center implicitly.
[081] It is appreciated that compounds of the present invention may have
a chiral center and may exist in and be isolated in optically active and racemic
forms. Some compounds may exhibit polymorphism. It is to be understood that
the present invention encompasses any racemic, optically-active, diastereomeric,
polymorphic, or stereoisomeric form, or mixtures thereof, of a compound of the
invention, which possess the useful properties described herein, it being well
known in the art how to prepare optically active forms (for example, by resolution
of the racemic form by recrystallization techniques, by synthesis from optically-
active starting materials, by chiral synthesis, or by chromatographic separation
using a chiral stationary phase).
-20-

[082] Geometric isomers can also exist in the compounds of the present
invention. The present invention encompasses the various geometric isomers
and mixtures thereof resulting from the arrangement of substituents around a
carbon-carbon double bond or arrangement of substituents around a carbocyciic
ring. Substituents around a carbon-carbon double bond are designated as being
in the "Z' or "£" configuration wherein the terms "Z' and "E" are used in
accordance with IUPAC standards. Unless otherwise specified, structures
depicting double bonds encompass both the E and Z isomers.
[083] Substituents around a carbon-carbon double bond alternatively can
be referred to as "cis" or "trans," where "cis" represents substituents on the same
side of the double bond and "trans" represents substituents on opposite sides of
the double bond. The arrangement of substituents around a carbocyciic ring is
designated as "cis" or "trans." The term "cis" represents substituents on the same
side of the plane of the ring and the term "trans" represents substituents on
opposite sides of the plane of the ring. Mixtures of compounds wherein the
substituents are disposed on both the same and opposite sides of plane of the
ring are designated "cis/trans."
Embodiments of the Invention
[084] One embodiment provides methods for inhibiting VCAM-1
expression, MCP-1 expression and/or SMC proliferation in a mammal, comprising
administering a therapeutically effective amount of a compound of Formula 1:

wherein:
X is selected from CR-H, CR11R13, CO, CS, O, S, SO, S02, N and NRn,
wherein Rn may be the same or different than R13;
Y is selected from CR12, CR12Ri4, CO, CS, O, S, SO, S02, N and NR12,
wherein Ri2 may be the same or different than R14;
-21 -

Ri, R2, R3, R4, R5, Re, R7, Ra, R9, R10, R11, R12, R13, Rand Ri7are each
independently selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino,
aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl,
halogen, haloalkyl, heteroaryl, heterocyclyl, hydrogen, hydroxyl, ketone, nitro,
phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone, or
two adjacent substituents selected from R1, R2, R3, R4, R5, R6, R7, Ra, R9,
R10, R11, Ri2> R13, and R14 are connected in a 5 or 6-membered ring to form a
bicyclic aryl, bicyclic heteroaryl or bicyclic heterocyclyl;
each W is independently selected from C and N, wherein if W is N, then p
is 0 and if W is C, then p is 1;
Z-], Z2 and Z3 are each independently selected from a single bond and a
double bond;
wherein if Y is O, then X is not CO;
wherein if at least one W is not N, then
a) X and Y are each CO,
b) X is NRn and Z2 is a double bond, or
c) two adjacent substituents selected from R5, R6, R7, Rs, and Rg are
connected in a 5 or 6-membered ring to form a bicyclic aryl, bicyclic heteroaryl or
bicyclic heterocyclyl;
and pharmaceutically acceptable salts and hydrates thereof.
[085] In one embodiment, R7 is hydroxyl. In another embodiment, at
least one of R1f R2, R3, R4, R5, Re, R7, Ra, R9, R10, R11, R12, R13, Rand R17 is
selected from alkoxy, alkyl, amino, aminoalkoxy, aminoalkyl, carboxyalkoxy,
halogen, heterocyclyl, heterocyclylalkoxy, heterocyclylalkyl, hydroxyalkoxy,
hydroxyalkyl, and hydroxyl.
[086] In one embodiment, X is selected from CR-n, CO, N, NRn and O;
and Y is selected from CR-|2, CO, and NR-12. In another embodiment, X is O and Y
is CO.
[087] In one embodiment, Z1 and Z3 are single bonds, and Z2 is a double
bond. In another embodiment, Z1 is a double bond and Y is CO. In another
embodiment, Z1 and Z3 are double bonds.
[088] In one embodiment, at least one W in the A ring of Formula 1 is N.
In another embodiment, the W bonded to (Rp is N. In another embodiment, the
-22-

W bonded to (Rio)P is N. Another embodiment provides that at least one W in the
C ring of Formula 1 is N. In another embodiment, the W bonded to (R7)p is N.
[089] One embodiment provides a compound of Formula I:

wherein:
X is selected from CRu, CO, N, NR-H and.O;
Y is selected from CR12, CO, and NR12;
R-ii R2> R3> R4, R5. R6, R7, R8» R9, R10, R11. Ri2> Ri3. Ri4and Rare each
independently selected from alkoxy, alkyl, amino, aminoalkoxy, aminoalkyl,
carboxyalkoxy, halogen, heterocyclyl, heterocyclylalkoxy, heterocyclylalkyl,
hydrogen, hydroxyalkoxy, hydroxyalkyl, and hydroxyl, or
two adjacent substituents selected from R5, R6, R7, Rs and R9 are
connected in a 5 or 6-membered ring to form a bicyclic aryl, bicyclic heteroaryl or
bicyclic heterocyclyl;
each W is independently selected from C and N, wherein if W is N, then p
is 0 and if W is C, then p is 1;
Z-i, Z2 and Z3 are each independently selected from a single bond and a
double bond;
wherein if at least one W is not N, then
a) X and Y are each CO, or
b) X is NR11 and Z2 is a double bond;
and pharmaceutically acceptable salts and hydrates thereof.
[090] An alternative embodiment provides compounds of Formula 1:
-23-


or a pharmaceutical acceptable salt thereof,
wherein
R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, and R17
are independently selected from the group consisting of (Ci-C22)alkyl, (C2-
C22)alkenyl, (C2.C22)alkynyl, aryl, heteroaryl, alkoxy, aryloxy, benzyl, phenyl,
carbonyl, thioketone, hydrogen, hydroxyl (OH), acetyl, hydroxyalkyl, aminoalkyl,
amides, carbamates, halogen, bromide (Br), iodide (I), fluoride (F), chloride (CI),
CF3, CCI3, sulfonic acid (-SO3H), phosphate, O-sulfate (sulfate conjugate), O-
glucoronidate [glucoronic (glucuronic) acid conjugates], monoesters, dicarboxylic
acid, #STR55#, #STR66#, #STR77#, #STR88#, #STR99#, #STR100#,
wherein W can be C or N;
wherein when W is a nitrogen atom, the nitrogen atom will only bind to
three covalent bonds due to available valence electrons.
-24-
The structures below demonstrate a nitrogen arrangement of one
embodiment of the compounds of Formula 1:



wherein the same applies to any W:
wherein
Xcan be CH, CH2, CR11, CR13, CHR11, CHR13, CR11R13, CS, 0, S,
SO, S02) NH, NR11 with the proviso that X and Y do not exceed the number of
valence electrons available as per definitions of X and Y above
Yean beCH, CH2, CR12, CR14, CHR12, CHR14, CR11R14, CO, CS, O,
S, SO, SO2, NH, NR11 with the proviso that X and Y do not exceed the number of
valence electrons available as per definitions of X and Y above
-25-
Z can be a single, double bond or triple bond, with the proviso that X and Y
do not exceed the number of valence electrons available as per definitions of X
and Y above



R15 and R16 are substituents independently selected from the group
consisting of (C-i.Calkyl, (C2-C22)alkenyl, (C2-C22)alkynyl, aryl, heteroaryl, alkoxy,
aryloxy, benzyl, phenyl, carbonyl, hydrogen, hydroxyl (OH), acetyl, hydroxyalkyl,
aminoalkyl, amides, carbamates, halogen, bromide (Br), iodide (I), fluoride (F),
chloride (CI), CF3, CCI3, sulfonic acid (-SO3H), phosphate, or a derivative thereof,
wherein said derivative is optionally substituted and optionally branched, and may
have one or more of the C atoms replaced by S, N or O;
wherein Formula 1 compounds have at least one proviso selected from the
following
R7 is a hydroxyl;
at least one W is a N;
at least one of R1-R10 is #STR77#, #STR88# or #STR99#;
at least one of R1-R10 is #STR66#;
one of R1-R10 is a monoester;
one of R1-R10 is a dicarboxylic acid;
one of R1-R10 is succinic acid;
R7 is #STR55#;
R7 and R2 are #STR55#;
R7 and R2 are hydroxyls; and
R7 is #STR66#.
[091] Non-limiting embodiments of Formula 1 include:
R7 is a hydroxyl and at least one W is a N;
R7 is a hydroxyl and at least one of R1-R6 and R8-R10 is #STR66#;
R7 is a hydroxyl and at least one of R1-R6 and R8-R10 is #STR77#,
#STR88# or#STR99#; and
- 26 -

R7 is #STR66# and at least one W is a N.
-27-
[092] Other alternative embodiments of Formula 1 include



-28-


-29-


-30-


or a pharmaceutically acceptable salt thereof,
wherein
R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, and R17
are independently selected from the group consisting of (Ci_C22)alkyl, (C2-
C22)alkenyl, (d-C22)alkynyl, aryl, heteroaryl, alkoxy, aryloxy, benzyl, phenyl,
carbonyl, thioketone, hydrogen, hydroxyl [OH], acetyl, hydroxyalkyl, aminoalkyl,
amides, carbamates, halogen, bromide [Br], iodide [I], fluoride [F], chloride [CI],
CF3, CCI3) sulfonic acid [-SO3H], phosphate, O-sulfate [the sulfate conjugate], O-
glucoronidate [the glucoronic (AKA glucuronic) acid conjugates], monoesters,
dicarboxylic acid, #STR55#, #STR66#, #STR77#, #STR88#, #STR99#,
#STR100#,
wherein W can be C or N;
wherein when W is a nitrogen atom, the nitrogen atom will only bind to
three covalent bonds due to available valence electrons.
The structures below demonstrate a nitrogen arrangement of one
embodiment of the compounds of Formula 1:
-31-


wherein
Xcan be CH, CH2l CR11, CR13, CHR11, CHR13, CR11R13, CS, O, S,
SO, SO2, NH, NR11 with the proviso that X and Y do not exceed the number of
valence electrons available as per definitions of X and Y above
Yean be CH, CH2, CR12, CR14, CHR12, CHR14, CR11R14, CO, CS, O,
S, SO, S02, NH, NR11 with the proviso that X and Y do not exceed the number of
valence electrons available as per definitions of X and Y above
Z can be a single, double bond or triple bond, with the proviso that X and Y
do not exceed the number of valence electrons available as per definitions of X
and Y above
wherein

-32-


R15 and R16 are substituents independently selected from the group
consisting of (C-i_C22)alkyl, (C2-C22)alkenyl, (Ci.C22)alkynyl, aryl, heteroaryl, alkoxy,
aryloxy, benzyl, phenyl, carbonyl, hydrogen, hydroxyl (OH), acetyl, hydroxyalkyl,
aminoalkyl, amides, carbamates, halogen, bromide (Br), iodide (I), fluoride (F),
chloride (CI), CF3, CCI3, sulfonic acid (-SO3H), phosphate, or a derivative thereof,
wherein said derivative is optionally substituted and optionally branched, and may
have one or more of the C atoms replaced by S, N or O;
wherein non limiting examples of Formula 1 have at least one proviso
selected from the following:
R7 is a hydroxyl;
at least one W is a N;
at least one of R1-R10 is #STR77#, #STR88# or #STR99#;
at least one of R1-R10 is #STR66#;
one of R1-R10 is a monoester;
one of R1-R10 is a dicarboxylic acid;
one of R1-R10 is succinic acid;
R7 is #STR55#;
R7 and R2 are #STR55#;
R7 and R2 are hydroxyls; and
R7 is #STR66#.
-33-

[093] Non-limiting examples include compounds of Formula 1 where
R7 is a hydroxyl and at least one W is a N;
R7 is a hydroxyl and at least one of R1-R6 and R8-R10 is #STR66#;
R7 is a hydroxyl and at least one of R1-R6 and R8-R10 is #STR77#,
#STR88# or #STR99#; and
R7 is #STR66# and at least one W is a N.
Pharmaceutical Formulations and Methods of Treatment
[094] Embodiments of the present invention also provide pharmaceutical
compositions comprising compounds disclosed herein formulated together with
one or more pharmaceutically acceptable carriers. These formulations include
those suitable for oral, rectal, topical, buccal and parenteral (e.g., subcutaneous,
intramuscular, intradermal, intravenous) administration, although the most suitable
form of administration in any given case will depend on the degree and severity of
the condition being treated and on the nature of the particular compound being
used.
[095] Formulations suitable for oral administration may be presented in
discrete units, such as capsules, cachets, lozenges, or tablets, each containing a
predetermined amount of the compound as powder or granules; as a solution or a
suspension in an aqueous or non-aqueous liquid; or as an oil-in-water or water-in-
oil emulsion. As indicated, such formulations may be prepared by any suitable
method of pharmacy which includes the step of bringing into association the active
compound and the carrier or excipient (which may constitute one or more
accessory ingredients). The carrier must be acceptable in the sense of being
compatible with the other ingredients of the formulation and must not be
deleterious to the recipient. The carrier may be a solid or a liquid, or both, and
may be formulated with the compound as a unit-dose formulation, for example, a
tablet, which may contain from 0.05% to 95% by weight of the active compound.
Other pharmacologically active substances may also be present including other
compounds. The formulations of the invention may be prepared by any of the well
known techniques of pharmacy consisting essentially of admixing the
components.
-34-

[096] For solid compositions, conventional nontoxic solid carriers include,
for example, pharmaceutical grades of mannitol, lactose, starch, magnesium
stearate, sodium saccharin, talc, cellulose, glucose, sucrose, magnesium
carbonate, and the like. Liquid pharmacologically administrable compositions can,
for example, be prepared by dissolving or dispersing, an active compound as
described herein and optional pharmaceutical adjuvants in an excipient, such as,
for example, water, saline, aqueous dextrose, glycerol, ethanol, and the like, to
thereby form a solution or suspension. In general, suitable formulations may be
prepared by uniformly and intimately admixing the active compound with a liquid
or finely divided solid carrier, or both, and then, if necessary, shaping the product.
For example, a tablet may be prepared by compressing or molding a powder or
granules of the compound, optionally with one or more accessory ingredients.
Compressed tablets may be prepared by compressing, in a suitable machine, the
compound in a free-flowing form, such as a powder or granules optionally mixed
with a binder, lubricant, inert diluent and/or surface active/dispersing agent(s).
Molded tablets may be made by molding, in a suitable machine, the powdered
compound moistened with an inert liquid diluent.
[097] Formulations suitable for buccal (sub-lingual) administration
include lozenges comprising a compound in a flavored base, usually sucrose and
acacia ortragacanth, and pastilles comprising the compound in an inert base such
as gelatin and glycerin or sucrose and acacia.
[098] Formulations of the present invention suitable for parenteral
administration comprise sterile aqueous preparations of the compounds, which
are approximately isotonic with the blood of the intended recipient. These
preparations are administered intravenously, although administration may also be
effected by means of subcutaneous, intramuscular, or intradermal injection. Such
preparations may conveniently be prepared by admixing the compound with water
and rendering the resulting solution sterile and isotonic with the blood. Injectable
compositions according to the invention may contain from 0.1 to 5% w/w of the
active compound.
[099] Formulations suitable for rectal administration are presented as
unit-dose suppositories. These may be prepared by admixing the compound with
-35-

one or more conventional solid carriers, for example, cocoa butter, and then
shaping the resulting mixture.
[0100] Formulations suitable for topical application to the skin may take
the form of an ointment, cream, lotion, paste, gel, spray, aerosol, or oil. Carriers
and excipients which may be used include Vaseline, lanoline, polyethylene
glycols, alcohols, and combinations of two or more thereof. The active compound
is generally present at a concentration of from about 0.1% to about 15% w/w of
the composition, for example, from about 0.5 to about 2%.
[0101] The amount of active compound administered may be dependent
on the subject being treated, the subject's weight, the manner of administration
and the judgment of the prescribing physician.
[0102] In another embodiment, intermittent administration, such as on a
monthly or yearly basis, of a dose of the encapsulated compound may be
employed. Encapsulation facilitates access to the site of action and allows the
administration of the active ingredients simultaneously, in theory producing a
synergistic effect. In accordance with standard dosing regimens, physicians will
readily determine optimum dosages and will be able to readily modify
administration to achieve such dosages.
[0103] A therapeutically effective amount of a compound or composition
disclosed herein can be measured by assessing the therapeutic effectiveness of
the compound. Toxicity and therapeutic efficacy can be determined by standard
pharmaceutical procedures in cell cultures or experimental animals, e.g., for
determining the LD50 (the dose lethal to 50% of the population) and the ED50 (the
dose therapeutically effective in 50% of the population). The dose ratio between
toxic and therapeutic effects is the therapeutic index and it can be expressed as
the ratio LD50/ED5o. Compositions that exhibit large therapeutic indices are
preferable.
[0104] The therapeutically effective dose can be estimated initially from
cell culture assays. A dose may be formulated in animal models to achieve a
circulating plasma concentration range that includes the IC50 (i.e., the
concentration of the therapeutic which achieves a half-maximal inhibition of
symptoms) as determined in cell culture assays or animal models. Levels in
plasma may be measured, for example, by high performance liquid
-36-

chromatography. The effects of any particular dosage can be monitored by a
suitable bioassay. Examples of dosages are: about 0.1 x|C50, about 0.5xlC50,
about 1 xlC5o, about 5x|C5o, 10x|C5o, about 50x|C5o, and about 100x|C5o.
[0105] Data obtained from the cell culture assays or animal studies can be
used in formulating a range of dosage for use in humans. Therapeutically
effective dosages achieved in one animal model may be converted for use in
another animal, including humans, using conversion factors known in the art (e.g.,
Freireich et al. (1966) Cancer Chemother Reports 50, 219-244) and Table 1 for
Equivalent Surface Area Dosage Factors).
Table 1

\. To: Mouse
(20 g) Rat
(150 g) Monkey
(3.5 kg) Dog
(8 kg) Human
(60 kg)
From: \





Mouse 1 1/2 YA 1/6 1/12
Rat 2 1 y2 1/4 1/7
Monkey 4 2 1 3/5 1/3
Dog 6 4 3/5 1 1/2
Human 12 7 3 2 1
[0106] The dosage of such compounds lies preferably within a range of
circulating concentrations that include the ED50 with little or no toxicity. The
dosage may vary within this range depending upon the dosage form employed
and the route of administration utilized. Generally, a therapeutically effective
amount may vary with the subject's age, condition, and sex, as well as the
severity of the medical condition in the subject. The dosage may be determined
by a physician and adjusted, as necessary, to suit observed effects of the
treatment.
[0107] In one embodiment, a compound as disclosed herein, or a
pharmaceutically acceptable salt or hydrate thereof, is administered in
combination with another therapeutic agent. The other therapeutic agent can
provide additive or synergistic value relative to the administration of a flavonoid
compound alone. The therapeutic agent can be, for example, a statin, a PPAR
-37-

agonist (e.g., a thiazolidinedione orfibrate), a bile-acid-binding-resin, niacin, a
RXR agonist, an anti-obesity drug, a hormone, a tyrophostine, a sulfonylurea-
based drug, a biguanide, an alpha-glucosidase inhibitor, apolipoprotein E, a
cardiovascular drug, an HDL-raising drug, an HDL enhancer, or a regulator of the
apolipoprotein A-1V and/or apolipoprotein genes.
[0108] One embodiment provides methods for treating, preventing or
mitigating inflammatory conditions and related disease states, characterized by
altered expression of markers of inflammation such as VCAM-1, MCP-1 and/or
SMC proliferation, in a mammal. In one embodiment, the inflammatory conditions
and related disease states are those where inhibition of VCAM-1, MCP-1 and/or
SMC proliferation is desirable.
[0109] Another embodiment provides methods for regulating markers of
inflammation, including vascular inflammation, and their use in the treatment and
prevention of inflammatory and cardiovascular diseases and related disease
states in a mammal.
[0110] In one embodiment, a method of treating, preventing or mitigating
inflammatory conditions, such as cardiovascular or inflammatory disorders,
comprises administering a therapeutically effective amount of a disclosed
compound. The disclosed compound may be administered as a pharmaceutically
acceptable composition, comprising a disclosed compound and a
pharmaceutically acceptable carrier. In another embodiment, a compound of the
present invention is administered as a pharmaceutically acceptable composition,
pharmaceutically acceptable salt, or pharmaceutically acceptable formulation;
optionally in a combination or alternation therapy with a therapeutic agent or at
least one other compound of the present invention. In combination therapy,
effective dosages of two or more agents are administered together, whereas
during alternation therapy an effective dosage of each agent is administered
serially.
[0111] In another embodiment, a compound of the present invention is
administered as a pharmaceutical formulation, or prodrug; optionally in a
combination or alternation therapy with a therapeutic agent or at least one other
compound of the present invention.
-38-

[0112] Embodiments of the present invention provide methods for treating,
preventing or mitigating cardiovascular disorders mediated by VCAM-1, MCP-1,
and/or SMC proliferation, comprising administering to a patient a therapeutically
effective amount of a compound of the invention, or in another embodiment, a
composition comprising a compound of the invention and a pharmaceutically
acceptable carrier.
[0113] "Cardiovascular disease" refers to diseases of the heart and
circulatory system. Cardiovascular diseases that the compounds of the present
invention are useful for preventing or treating include metabolic syndrome,
arteriosclerosis, atherosclerosis, angina, stroke, ischemia, endothelial dysfunction
(in particular those affecting blood vessel elasticity), peripheral vascular disease,
coronary heart disease, myocardial infarction, cerebral infarction, obesity,
reperfusion injury, angioplasty restenosis, hypertension, vascular complications of
diabetes and thrombosis.
[0114] In a preferred embodiment, a compound of the present invention is
administered to a patient in a therapeutically effective amount for treating,
preventing or mitigating a cardiovascular disease. In another embodiment, the
compound of the present invention is administered as a pharmaceutically
acceptable composition, pharmaceutically acceptable salt, or pharmaceutically
acceptable formulation; optionally in a combination or alternation therapy with a
therapeutic agent or at least one other compound of the present invention.
[0115] In a preferred embodiment, a compound of the present invention is
administered to a patient in a therapeutically effective amount for treating,
preventing, or mitigating restenosis. In one embodiment, the restenosis is
angioplasty restenosis. In another embodiment, the restenosis is post-angioplasty
restenosis. In another embodiment, the compound of the present invention is
administered as a pharmaceuticaliy acceptable formulation, or prodrug; optionally
in a combination or alternation therapy with a therapeutic agent or at least one
other compound of the present invention.
[0116] Embodiments of the present invention provide methods for treating,
preventing or mitigating inflammatory disorders mediated by VCAM-1 and/or
MCP-1, comprising administering to a patient a therapeutically effective amount of
-39-

a compound of the invention, or in another embodiment, a composition comprising
a compound of the invention and a pharmaceutically acceptable carrier.
[0117] "Inflammatory disorders" includes diseases that are mediated by
VCAM-1 and/or MCP-1. Inflammatory disorders that the compounds of the
present invention are useful for preventing or treating include arthritis, asthma,
dermatitis, psoriasis, cystic fibrosis, post transplantation late and chronic solid
organ rejection, multiple sclerosis, systemic lupus erythematosus, inflammatory
bowel diseases, autoimmune diabetes, diabetic retinopathy, diabetic nephropathy,
diabetic vasculopathy, ocular inflammation, uveitis, rhinitis, ischemia-reperfusion
injury, post-angioplasty restenosis, chronic obstructive pulmonary disease
(COPD), glomerulonephritis, Graves disease, gastrointestinal allergies,
conjunctivitis, atherosclerosis, coronary artery disease, angina, and small artery
disease.
[0118] In one embodiment, the inflammatory disorders that the
compounds of the present invention are useful for preventing or treating comprise
diseases, conditions and disorders mediated by VCAM-1, MCP-1, and/or SMC
proliferation that are not disclosed in PCT/US2005/038048. For example,
inflammatory disorders may not be ischemia-reperfusion injury, post-angioplasty
restenosis, atherosclerosis, coronary artery disease, angina, and small artery
disease.
[0119] In a preferred embodiment, a compound of the present invention is
administered to a patient in a therapeutically effective amount for inhibition of
VCAM-1 expression. In another embodiment, the compound of the present
invention is administered as a pharmaceutically acceptable composition, a
pharmaceutically acceptable salt, or a pharmaceutically acceptable formulation;
optionally in a combination or alternation therapy with a therapeutic agent or at
least one compound of the present invention.
[0120] In a preferred embodiment, a compound of the present invention is
administered to a patient in a therapeutically effective amount for inhibition of
MCP-1 expression. In another embodiment, the compound of the present
invention is administered as a pharmaceutically acceptable composition, a
pharmaceutically acceptable salt, or a pharmaceutically acceptable formulation;
-40-

optionally in a combination or alternation therapy with a therapeutic agent or at
least one compound of the present invention.
[0121] In a preferred embodiment, a compound of the present invention is
administered to a patient in a therapeutically effective amount for inhibition of
SMC proliferation. In another embodiment, the compound of the present invention
is administered as a pharmaceutical acceptable composition, a pharmaceutically
acceptable salt, or a pharmaceutically acceptable formulation; optionally in a
combination or alternation therapy with a therapeutic agent or at least one
compound of the present invention.
[0122] In a preferred embodiment, a compound of the present invention is
administered to a patient in a therapeutically effective amount for inhibition of
MCP-1 and VCAM-1 expression. In another embodiment, the compound of the
present invention is administered as a pharmaceutically acceptable composition, a
pharmaceutically acceptable salt, or a pharmaceutically acceptable formulation;
optionally in a combination or alternation therapy with a therapeutic agent or at
least one compound of the present invention.
[0123] In another aspect, the present invention provides for the use of the
compounds of the present invention for the manufacture of a medicament for
treating, preventing or mitigating diseases or disorders mediated by SMC
proliferation wherein such compositions comprise an effective SMC proliferation-
inhibiting amount of a compound of the present invention or a pharmaceutically
acceptable salt thereof and/or a pharmaceutically acceptable composition.
[0124] In another aspect, the present invention provides a method for
treating, preventing or mitigating a disease or disorder mediated by SMC
proliferation comprising administering to a patient an effective SMC proliferation-
inhibiting amount of a compound of the present invention or a pharmaceutically
acceptable salt thereof and/or a pharmaceutically acceptable composition.
[0125] Embodiments of the present invention include the use of the
disclosed compounds for the manufacture of a medicament for treating,
preventing or mitigating inflammatory conditions.
[0126] Embodiments of the present invention include the use of the
disclosed compounds for the manufacture of a medicament for treating,
preventing or mitigating diseases or disorders mediated by VCAM-1 expression.
-41 -

[0127] Embodiments of the present invention include the use of the
disclosed compounds for the manufacture of a medicament for treating,
preventing or mitigating diseases or disorders mediated by MCP-1 expression.
[0128] Embodiments of the present invention include the use of the
disclosed compounds for the manufacture of a medicament for treating,
preventing or mitigating diseases or disorders mediated by smooth muscle cell
proliferation.
Stents
[0129] Given the correlation between physical injury to the vasculature
and restenosis, for example that arising after angioplasty, it is explicitly
contemplated that the compounds of the present invention are capable of being
used before, contemporaneously with, or subsequent to angioplasty or other
medical treatment expected to give rise to a vascular injury, localized vascular
inflammatory response or vascular injury response.
[0130] In a preferred embodiment, a compound of the present invention
is administered through the use of an intraluminal stent. In another embodiment,
the compound of the present invention is administered as a pharmaceutically
acceptable formulation, prodrug, as a pharmaceutically acceptable salt or in a
combination or alternation therapy with a therapeutic agent or at least one
compound of the present invention.
[0131] Compounds of the present invention may be eluted through a stent
or alternatively may be coated on the stent allowing for controlled release to the
local environment, as taught by US Pat. Nos. 5,837,008, 5,824,048, 5,679,400,
5,464,650, 6,908,624, 6,890,583, and 6,790,228.
[0132] In another aspect, compounds of the present invention may be
administered in a therapeutically effective amount for treatment of small vessel
disease not otherwise treatable by surgery or angioplasty or other vascular
disease in which surgery is not a preferred option. In a preferred embodiment a
compound of the present invention is administered in a therapeutically effective
amount systemically or local to the locus of the small vessel disease. In another
embodiment, the compound of the present invention is administered as a
pharmaceutically acceptable formulation, prodrug, pharmaceutically acceptable
- 42 -

salt or in a combination or alternation therapy with a therapeutic agent or at least
one compound of the present invention.
[0133] In a further aspect, compounds of the present invention can be
administered in a therapeutically effective amount prior to revascularization
therapy. In a preferred embodiment, a compound of the present invention is
administered in a therapeutically effective amount systemically or local to the site
of revascularization. In another embodiment, a compound of the present
invention is administered as a pharmaceutically acceptable formulation, prodrug,
pharmaceutical acceptable salt or in a combination or alternation therapy with a
therapeutic agent or at least one compound of the present invention.
Treatment or Prevention of Other Related Diseases
[0134] In a preferred embodiment,-a compound of the present invention is
administered as a preventative measure to a patient having a non-genetic
predisposition to a disease including a cardiovascular disease or an inflammatory
disorder. Examples of such non-genetic predispositions include cardiac bypass
surgery and PTCA (which can lead to restenosis), an accelerated form of
atherosclerosis, diabetes in women, (which can lead to polycystic ovarian
disease), and cardiovascular disease (which can lead to impotence). Accordingly,
compositions of the invention may be used for the prevention of one disease or
disorder and concurrently treating another (e.g., prevention of polycystic ovarian
disease while treating diabetes; prevention of impotence while treating a
cardiovascular disease).
PREPARATION OF COMPOUNDS
[0135] The following examples demonstrate methods to synthesize
compounds of the invention wherein each W is independently a nitrogen or
carbon, and an R-group may be independently selected,from the aforementioned
group of substituents. The chosen synthetic method may involve use of protecting
groups, which can be selected from those known in the art (e.g., Protective
Groups in Organic Synthesis, By TW Greene & PGM Wuts John Wiley & Sons,
New York, 1991, 2nd ed). Compounds synthesized in the manner described
below may additionally be modified by functional group manipulations (e.g.,
Organic Synthesis by MB Smith, McGraw-Hill, New York, 1994, Int. Ed. Chapter
2), including reduction, oxidation, alkylation, and acylation.
-43-

[0136] Flavonoid compounds may be represented by the general structure
of Formula A.

[0137] Ra may be selected from groups including alkoxy, aryloxy, alkyl,
alkenyl, alkynyl, amide, amino, aryl, arylalkyl, carbamate, carboxy, cyano,
cycloalkyl, ester, ether, formyl, halogen, haloalkyl, heteroaryl, heterocyclyl,
hydrogen, hydroxyl, ketone, nitro, phosphate, sulfide, sulfinyl, sulfonyl, sulfonic
acid, sulfonamide and thioketone. Rbmay be selected from groups including alkyl,
amino, cyano, halogen and hydrogen. Rc represents substituents such as alkyl,
alkoxy, halogen, hydroxyl and hydrogen.
[0138] One of ordinary skill will appreciate that flavonoid compounds as
disclosed herein may be synthesized from readily available starting materials as
outlined below.
[0139] Formula B represents a general formula for flavonoid compounds
comprising a phenyl-chromene:

[0140] Flavonoids of Formula B can be synthesized by the procedure of
Scheme 1:
-44-


[0141] Acid chloride 2 (Rd = CI) may be used directly in a reaction with
acetophenone 1 to provide ester 3. The acid chloride may also be generated in
situ by exposing the carboxylic acid 2 (Rd = OH) to a chlorinating agent such as
POCI3. Ester 3 can be converted into diketone 4 via intramolecular
rearrangement. Rearrangement may be achieved using a catalytic amount of
base, such as potassium t-butoxide, KOH, NaH and the like. Cyclization of phenol
4 to flavonoid 5 can be achieved by heating phenol 4 in the presence of a strong
protic (HCI, AcOH, HI, AcOH, HBr, and mixtures thereof) or Lewis (BBr3) acid.
[0142] Flavonoid compounds can be synthesized following the procedure
of Scheme 2:
-45-


Scheme 2
[0143] Diketone 10 may be prepared by first exposing methyl ketones 6 or
9 to basic conditions, such as potassium t-butoxide, KOH, NaH and the like, to
form the corresponding enolate. Then, reaction with acyl halide 8 or 7 (X = Hal),
respectively, affords diketone 10. Cyclization of diketone 10 to flavonoid 5 may
likewise be accomplished by a number of methods. When Re= F, exposure of 10
to heat and a polar solvent results in ring closure via nucleophilic aromatic
substitution. Alternatively, strong protic or Lewis acids may be used when Re =
alkoxy, SH, or NH2. Suitable acids include HCI, AcOH, HI, AcOH, HBr, BBr3, and
mixtures thereof.
-46-
[0144] Formula C represents flavonoid compounds comprising a naphthyl;


[0145] Flavonoids of Formula C can be prepared via the procedure of
Scheme 3.

[0146] Arylation of naphthalene analog 11 with boronic acid (or boronic
ester) 12 occurs by a Pd-catalyzed Suzuki coupling. Suitable Pd catalysts include
Pd(Ph3)4 along with non-phosphine Pd catalysts, such palladium acetate. Other
coupling procedures that may be used in the synthesis of flavonoid 13 include
Stille coupling.
[0147] Prodrugs of flavonoid compounds can be prepared according to
Scheme 4:

[0148] Prodrug esters 19 can be synthesized by treating phenol 16 with
acid halide 17. Suitable acid halides include acid chlorides and bromides.
Alternatively, esterification of phenol 16 with acid 18 in the presence of a
carbodiimide, such as EDCI, affords ester 19.
[0149] The following compounds were obtained from commercially
available sources: probucol (Sigma catalogue number P9672), resveratrol (Sigma,
catalogue number R5010); taxol (USB catalogue number 10119; and rapamycin
-47-

(Calbiochem catalogue number 553210). AGI1067 was prepared according to
known methods (Meng. et al., J. Med. Chem. 2004, 47, 6420-6432).
[0150] Abbreviations used herein denote the following compounds,
reagents and substituents: acetic acid (AcOH); 2,2'-azobisisobutyronitrile (AIBN);
A/-bromosuccinimide (NBS); N-tert-butoxycarbonyl (Boc); t-butyldimethylsilyl
(TBDMS); m-chloroperoxybenzoic acid (mCPBA); dimethylaminopyridine (DMAP);
dichloromethane (DCM); dimethylformamide (DMF); dimethylsulfoxide (DMSO);
ethanol (EtOH); ethyl acetate (EtOAc); 1-ethyl-3-(3-
dimethylaminopropyl)carbodiimide (EDCI); 1-hydroxybenzotriazole (HOBt);
iodomethane (Mel); lithium hexamethyldisilazide (LHMDS); methanol (MeOH);
methoxymethyl (MOM); tetrahydrofuran (THF).
EXAMPLES
Example 1: 2-(4-Hydroxy-pheny!)-pyrano[2,3-b]pyridin-4-one

[0151] In a 500 ml_ dry round bottom flask with reflux condenser and
magnetic stirrer was placed with 2-chloro-3-ethyl nicotinate (40.0 g, 215.5 mmol)
in methanol (200 mL). CH3ONa in methanol (25%, 65 ml_, 301.7 mmol) was
added slowly and the reaction mixture was refluxed for 16 hours. The reaction
was cooled to room temperature, quenched by addition of a saturated aqueous
NH4CI solution. The aqueous mixture was extracted with ethyl acetate. The
combined organic layers were washed well with water, brine, dried over Na2S04
and concentrated to give 35 g of 2-methoxy-3-methyl nicotinate with 97% yield.
Sodium hydride (60% in oil, 9.21 g, 230.3 mmol) was added to a dry 500 mL
round bottom flask followed by 100 mL DMF. 4-Methoxyacetophenone (31.45 g,
209.44 mmol) in 50 mL dry DMF was added drop-wise at 0°C over 30 min. The
reaction mixture was stirred for 1 h at room temperature. 2-Methoxynicotinic acid
methyl ester (35 g, 209.44 mmol) was dissolved in 50 mL dry DMF and added
-48-

slowly, keeping the temperature at 0°C. The mixture was stirred for 16 h at room
temperature, then quenched by addition of a saturated aqueous NH4CI solution
and diluted with water. The solid was filtered off, washed with water and dried to
give 56.7 g diketo product in 95% yield.
[0152] The diketo compound (56.7 g, 198.9 mmol) was added to a 1 L
round bottom flask together with pyridinium hydrochloride (345 g). The mixture
was heated at 190°C for 5 hours. The reaction mixture was cooled to room
temperature and diluted with water. The solid was isolated by filtration and purified
by column chromatography using 5% methanol in CH2CI2 to give 2-(4-hydroxy-
phenyl)-pyrano[2,3-b]pyridin-4-one (23.25 g, 48.8% yield). MS (ES) m/z: 240.07
(M+1); 13C-NMR (DMSO-de): 5 178.2,164.2,161.8,160.8,153.9,136.3,129.2,
123.2, 121.8,116.8,116.75, 116.74,105.7.
Example 2: 2-(4-Hydroxy~phenyl)-pyrano[3,2-b]pyridin-4-one

[0153] An example compound, (2-(4-hydroxy-phenyl)-pyrano[3,2-
b]pyridin-4-one) was synthesized in the following way.
-49-


[0154] In a 500 ml_ round-bottomed flask fitted with a condenser-and a
magnetic stirrer were placed MeOH (250 ml_), 3-hydroxypyridine-2-carboxylic acid
1 (10.0 g, 72 mmol) and concentrated H2SO4 (3 ml_). The reaction mix was
heated to 64°C for 24 hours. The reaction mix was cooled to room temperature.
The solvent was removed under reduced pressure; the residue was partitioned
between ethyl acetate (150 ml_) and water (20 ml_). Solid sodium carbonate was
added to adjust the pH to 6. The organic layer was separated, dried over Na2S04,
and concentrated to give crude 3.5 g of intermediate 2 (32% yield).
[0155] In a 50 ml_ round-bottomed flask fitted with a magnetic stirrer were
placed intermediate 2 (3.5 g, 22.8 mmol), potassium carbonate (3.46 g,
25.0 mmol), methyl iodide (4.87 g, 34.3 mmol) and DMF (20 ml_). The reaction
mix was stirred for 18 h at room temperature under nitrogen. The reaction mix was
diluted with ethyl acetate (30 mL) and water (10 ml_). The organic layer was
separated and aqueous layer was extracted with ethyl acetate. The combined
organic extracts were dried over Na2S04 and concentrated to give crude product,
which was then purified by column chromatography using 30% ethyl acetate in
hexane, to give 2.1 g of intermediate 3 (54% yield).
[0156] In 100 mL round-bottomed flask fitted with a magnetic stirrer were
placed NaH (1.62 g of 60% suspension in mineral oil, 40 mmol) and a solution of
intermediate 3 (3.5 g, 20 mmol) in anhydrous DMF (20 mL). The mixture was
stirred for 15 min at room temperature under nitrogen. Then, a solution of
4-methoxyacetophenone (3.3 g, 22 mmol) was added via syringe. The reaction
-50-

mix was stirred for overnight at room temperature. Then, a 10% aqueous solution
of NaH2S04 was used to adjust the pH to 7. The organic layer was separated and
the aqueous layer was extracted with ethyl acetate. The combined organic
extracts were dried over Na2S04 and concentrated to give crude product, which
was purified by column chromatography using 30% ethyl acetate in hexane, to
give 4.68 g of intermediate 4 (80% yield).
[0157] In a 50 ml_ round-bottomed flask fitted with a magnetic stirrer were
placed intermediate 4 (4.68 g, 16 mmol) and 45% HBr (25 mL). The reaction mix
was refluxed for 3 h, then cooled to room temperature. Solid NaHC03 was used to
adjust the pH to 7. Ethyl acetate (30 mL) was then added. The organic layer was
separated and aqueous layer was extracted with ethyl acetate (2x30 mL). The
combined organic extracts were dried over Na2S04 and concentrated to give
crude product, which was purified by column chromatography using 30%
methanol in ethyl acetate to give 125 mg of 2-(4-hydroxy-phenyl)-pyrano[3,2-
b]pyridin-4-one (3.2% yield); MS (ES) m/z: 240.09 (M+1), and 149.06.
Example 3: 2-(4-Hydroxyphenyl)-pyrano[2,3-c]pyridin-4-one

[0158] A 50 mL flask was charged with 5.0 g (0.0354 mol) 3-
fluoroisonicotinic acid and thionyl chloride (3.88 mL, 0.053 mol). The mixture was
heated to reflux for 1 h, then the excess thionyl chloride was evaporated under
vacuum. "Anhydrous methanol was added to the residue and the mixture was
heated to reflux for one hour. The reaction mixture was poured into sodium
bicarbonate solution and pH was adjusted to 7.0. The mixture was extracted with
EtOAc and the organic layer was dry over sodium sulfate. The organic solvent
was evaporated yielding the product (4.80 g, 88%). A 50 mL dry flask was
charged with methyl 3-fluoroisonicotinitate (3.50 g, 0.0227 mol), 4-
-51-

methoxyacetophenone (3.60 g, 0.024 mol) and 10 mL dry DMF under nitrogen.
Sodium hydride (1.82 g, 60% in oil) was added and the reaction was stirred for 30
min, then poured into ammonium chloride solution and extracted with EtOAc and
dried over sodium sulfate. The solution was concentrated and the residue was
pass through a column (EtOAc:hexane 1:3) to give the product (3.50 g, 54.0%). A
50 mL flask was charged with this product (0.5 g, 1.75 mmol) and pyridine
hydrogen chloride (2.02 g, 17.5 mmol) and heat to 190°C for 4 hours. The mixture
was poured into a sodium bicarbonate solution and the solid was collected by
filtration, washed with EtOAc and methanol to give 2-(4-hydroxyphenyl)-
pyrano[2,3-c]pyridin-4-one as a yellow product (0.36 g, 86%). MS (ES) m/z:
240.90 (M+1), 239.89 (M); MP 294-296°C.
Example 4: 2-(3-Fluoro-4-hydroxyphenyl)pyrano[2,3-b]pyridine-4-one

[0159] Methyl 2-methoxynicotinate was synthesized from ethyl 2-
chloronicotinate with sodium methoxide as in Example 1. A 50 mL flask was
charged with methyl 2-methoxynicotinate (2.50 g, 0.015 mol), 10 mL dry DMF and
60% NaH (0.745 g, 0.0186 mol) with magnetic stirring. 3'-FIuoro-4'-
methoxyacetophenone (2.60 g, 0.0155 mol) in 6 mL anhydrous DMF was added
over 5-10 min. After addition, the reaction mixture was stirred for 30 min. The
mixture was poured into 50 mL NH4CI solution, the yellow solid was filtered and
further washed with water and purified by column chromatography (hexane:EtOAc
4:1) to get (3.0 g, 66.4%) of product. A 50 mL flask was charged with this product
(0.8 g, 2.64 mmol) and pyridine hydrogen chloride (3.04 g, 26.4 mmol) and heated
to 190°C for 4 hours. The mixture was poured into sodium bicarbonate solution
and the solid was collected by filtration, washed with EtOAc and MeOH and
passed through a column (methanohdichloromethane 1:4) to afford 400 mg of 2-
-52-

(3~fluoro-4-hydroxyphenyl)pyrano[2,3-b]pyridine-4-one (59%). MS (ES) m/z:
257.85 (M); MP 267-268°C.
Example 5: 2-(4-Hydroxy-3-methylphenyl)-4H-pyrano[2,3-b]pyridine-4-one

[0160] Methyl 2-methoxynicotinate was synthesized from ethyl 2-
chloronicotinate with sodium methoxide as'described in Example 1. A 100 mL dry
flask was charged with 2-methylanisole (7.92 g, 65 mmol), acetyl chloride (5.1 mL,
71 mmol), aluminum chloride (9.45 g, 71 mmol) and 40 mL of anhydrous
dichloromethane. The reaction mixture was kept at reflux for 2 h, then poured into
15 mL of HCI (3 N) and extracted with 100 mL ether. The organic layer was
further washed with sodium bicarbonate to pH 6-7, then further washed with brine
and dried over sodium sulfate. The solvent was evaporated and the residue was
dried under high vacuum to yield the intermediate (10.0 g, 93.85%). A 100 mL dry
flask was charged with methyl 2-methoxynicotinate (2.50 g, 15 mmol), 10 mL
anhydrous DMF and NaH (0.9 g, 22.5 mmol, 60% in oil). The intermediate (2.58 g,
15.7 mmol) in 3 mL anhydrous DMF was added and the reaction was stirred for 2
hours. The mixture was poured into 120 mL of water with 3 mL AcOH. The yellow
solid was further wash with water and passed through a column (hexane:EtOAc
3:1) to give the methoxy intermediate (3.4 g, 75.7%). A 50 mL flask was charged
with the methoxy intermediate (1.0 g, 3.3 mmol) and pyridine hydrogen chloride
(4.0 g, 33 mmol) and heated to 190°C for 3 hours. The mixture was poured into a
sodium bicarbonate solution and the solid was collected by filtration, washed with
EtOAc and MeOH (20 mL each) to give 2-(4-hydroxy-3-methylphenyl)-4H-
pyrano[2,3-b]pyridine-4-one (0.58 g, 69.4%). MS (ES) m/z: 254.0 (M+1); MP 300-
302°C.
-53-

Example 6: 2-(4-Hydroxyphenyl)-4H-pyrano[3,2-c]pyridin-4-one

[0161] A solution of 4-chloropicolinic acid (3.0 g, 19.04 mmol) in EtOH
(100 ml_) was mixed with H2S04 (cone, 5 mL) and was stirred at reflux for 48
hours. The reaction mixture was cooled to room temperature and neutralized with
NaOH (1 N) to adjust pH = 8-9. The mixture was extract with dichloromethane
(3> [0162] To a solution of ethyl 4-ethoxypicolinate (3.44 g, 17.43 mmol) and
4-methoxy acetophenone (2.62 g, 17.43 mmol) in THF (100 mL) and DMSO (50
mL) was added NaH (1.4 g, 34.80 mmol). The resulting mixture was stirred at
95°C for 6 hours. The reaction mixture was cooled to room temperature and
quenched with water (100 mL). The mixture was extract with EtOAc (3x150 mL)
and concentration to a yellow solid. The solid was washed with hexanes to afford
the diketone (3.6 g, 69%).
[0163] The diketone (1 g, 3.34 mmol) was mixed with pyridine
hydrochloride (10 g). This mixture was stirred at 190°C under nitrogen for 12
hours. The mixture was then diluted with EtOAc (30 mL) and poured into a beaker
of 200 mL ice water. NaOH (1 N) was used to adjust the pH to 9. The solid was
then filtered off and washed with water, hexanes, dichloromethane, EtOAc
sequentially to afford the brownish solid 2-(4-hydroxyphenyl)-4H-pyrano[3,2-
c]pyridin-4-one (0.39 g, 49%). MS (ES) m/z: 240.92 (M+1), 239.89 (M); MP 306-
308°C.
Example 7: 2-(3-Chloro-4-hydroxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one
-54-


[0164] Sodium methoxide (18 ml_, 25 wt% in methanol) was added slowly
to a solution of ethyl-2-chloronicotinate (11.134 g 60 mmol) in 60 mL anhydrous
methanol. The reaction mixture was stirred under reflux for 15 h, then cooled to
room temperature. Methanol was removed in vacuo. The residue was dissolved in
EtOAc (200 mL) and saturated aqueous ammonium chloride (50 mL) was added.
The organic layer was separated and dried over anhydrous Na2S04. The solvent
was removed to give ethyI-2-methoxynicqtinate (8.58 g, 79%). Sodium hydride
(60% in mineral oil, 0.48 g, 12 mmol) was dissolved in anhydrous DMF (10 mL).
A solution of 3'-chloro-4'-methoxy acetophenone (1.85 g, 10 mmol) in anhydrous
DMF (5 mL) was added drop-wise at 0°C under nitrogen. The mixture was stirred
at 0°C for 5 min. and then at room temperature for 30 min. The mixture was
cooled to 0°C. A solution of ethyl 2-methoxy nicotinate (1.81 g, 10 mmol) in
anhydrous DMF (5 mL) was added slowly. The ice bath was removed and the
mixture was stirring at room temperature under nitrogen for 20 hours. Water (20
mL) was added and the mixture was extracted with EtOAc (2x100 mL). The
combined organic layers were washed with brine and dried over anhydrous
Na2S04. Removal of solvent gave a dark colored solid. Triturating with ether gave
a yellow solid (1.64 g, 51 %). The yellow solid (1.36 g, 4.21 mmol) and pyridinium
hydrochloride (7.3 g, 63.2 mmol) were mixed together and stirred at 190°C for 2 h,
then cooled to room temperature. Water (100 mL) was added. The solid was
separated by filtration, washed with water and dried under vacuum. The crude
compound was purified by column chromatography (Silica Gel 230-400 mesh; 5%
methanol in dichloromethane as an eluentto afford 2-(3-chloro-4-hydroxyphenyl)-
4H-pyrano[2,3-b]pyridine-4-one (0.385 g, 33% yield) as yellow solid. MS (ES)
m/z: 275.94 + 273.92 (two isotopes of M); MP 259-262°C.
Example 8: 2-(4-Hydroxy-3-methoxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one
-55-


[0165] A solution of ethyl 2-chloronicotinitate (6.0 g, 0.0323 mol) in
anhydrous methanol (10 mL) at room temperature was added sodium methoxide
(10 mL, 25% in methanol). The reaction mixture was stirred for half hour then
heated to reflux for one hour. The mixture was poured into water and extracted
with ethyl acetate and the organic layer was washed with water until neutral, dried
over sodium sulfate, and concentrated to give methyl 2-methoxynicotinitate (5.2 g,
96.3%).
[0166] A 100 mL dry flask was charged with acetovanillone (4.16 g, 0.025
mol) and anhydrous DMF (10 mL). Sodium hydride (1.05 g, 0.0263 mol, 60% in
mineral oil) was added and the reaction mixture was stirred at room temperature
followed by the dropwise addition of benzyl bromide (3.1 mL, 0.0263 mol). The
reaction was carried out at room temperature for 2 h, then poured into water. Ethyl
acetate (150 mL) was used to extract out the compound and the organic layer was
washed with water (2x100 mL), brine, dried over sodium sulfate, and
concentrated to give the benzyl intermediate (6.21 g, 96%), which was
subsequently used without further purification.
[0167] A 100 mL dry flask was charged with methyl 2-methoxynicotinitate
(2.2 g, 0.0131 mol), the benzyl intermediate (3.37 g, 0.0131 mol) and anhydrous
DMF (10 mL). Sodium hydride (0.524 g, 0.0131 mol, 60% in mineral oil) was
added and the reaction mixture was stirred for 2 hours at room temperature. The
reaction mixture was poured into water and extracted with ethyl acetate (150 mL).
The organic layer was washed with water (2*100 mL), brine (100 mL), dried over
sodium sulfate, and concentrated to give the intermediate (5.0 g, 97.6%). This
intermediate (4.0 g, 0.0102 mol) and pyridine hydrochloride (12.0 g, 0.102 mol)
were mixed and heated to 170-190°C for 20 min. The reaction mixture was cooled
and poured into water (100 mL). The mixture was extracted with ethyl acetate
(3x200 mL), and the combined organic layers were washed with brine (x3x100
mL), dried over sodium sulfate, and concentrated. The solid was further purified
-56-

by refluxing with methanol (40 mL). The solution was cooled and filtered to yield 2-
(4-hydroxy-3-methoxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one (250 mg, 9.1%).
MS (ES) m/r. 270.92, 269.91; MP 253-255°C.
Example 9: 2-(4-Methoxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one

[0168] In a 500 mL dry round bottom flask with reflux condenser and
magnetic stirrer was placed with 2-chloro-3-ethyI nicotinate (40.0 g, 215.5 mmol)
in methanol (200 mL), and sodium methoxide (65 mL, 301.7 mmol, 25% in
methanol) was added slowly and the reaction mixture was refluxed for 16 hours.
The reaction mixture was cooled to room temperature and the reaction was
quenched by addition of saturated aqueous NH4CI solution, followed by extraction
with ethyl acetate. The combined organic layers were washed well with water,
brine, dried over Na2SO4 and concentrated to give 2-methoxy-3-methyl nicotinate
(35 g, 97%). To a dry 500 mL round bottom flask was added NaH (9.21 g 230.3
mmol, 60% in mineral oil) in DMF (100 mL). 4-Methoxyacetophenone (31.45 g,
209.44 mmol) in dry DMF (50 mL) was added dropwise at 0°C over 30 min. The
reaction mixture was stirred for 1 h at room temperature. Then 2-methoxynicotinic
acid methyl ester (35 g, 209.44 mmol) dissolved in dry DMF (50 mL) was added
slowly on cooling. The mixture was stirred for 16 h at room temperature. The
reaction was quenched by addition of saturated NH4CI solution and diluted with
water. The solid was filtered off, washed with water and dried to give the diketo
product (56.7 g, 95 %). Polyphosphoric acid (8.0 g) was heated at 90°C and the
diketo compound (1.0 g, 3.50 mmol) was added slowly and heated at 90°C for 1
hour. The reaction mixture was cooled to room temperature and diluted with
water. The solid was isolated by filtration, washed with water and dried to give 2-
(4-methoxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one (570 mg, 64%). MS (ES) m/r.
254.89 (M+1), 253.90 (M); MP 269-270°C.
-57-

Example 10: 2-(4-(2-Hydroxyethoxy)phenyl)-4H-pyrano[2,3-b]pyridine-4-one

[0169] In a 100 mL dry round bottom flask with reflux condenser and
magnetic stirrer was placed 2-(4-hydroxy-phenyl)-pyrano[2,3-b]pyridin-4-one
(1.0 g, 4.18 mmol) in EtOH (10 mL) and acetonitrile (50 mL). 2-Chloroethanol
(2.05 g, 25.0 mmol) was added slowly and trie reaction mixture was refluxed for
48 hours. The reaction mixture was cooled to room temperature and concentrated
under reduced pressure. The crude product was purified by column
chromatography, using 2% MeOH in dichloromethane to afford 2-(4-(2-
hydroxyethoxy)phenyl)-4H-pyrano[2,3-b]pyridine-4-one (380 mg, 32% yield). MS
(ES) m/z: 284.94 (M+1), 283.95 (M); MP 157-159°C.
Example 11: 2-(5-Hydroxy-pyridin-2-yl)-chromen-4-one

[0170] An example compound, 2-(5-hydroxy-pyridin-2-yl)-chromen-4-one
was synthesized in the following way. In a 100 mL round-bottomed flask fitted
with a condenser and a magnetic stirrer were placed 5-amino-2-cyano pyridine
(1.0 g, 8.4 mmol), concentrated H2SO4 (4.2 mL), water (15 mL) and the mixture
was cooled to 0°C. A solution of NaN02 (636 mg, 9.22 mmol) in water (5.7 mL)
was added slowly at 0°C. Then, the reaction mix was stirred for 30 min. at 0°C.
The reaction mix was poured into a boiling mixture of water (11 mL) and H2SO4
-58-

(1 mL) and stirred for 30 min. The mixture was cooled and extracted with ethyl
acetate. The organic layer was washed with water, dried and concentrated to give
2 cyano-5-hydroxy pyridine (900 mg, 89%).
[0171] To a mixture of 2-cyano-5-hydroxy pyridine (200 mg, 1.66 mmol),
DMF (10 mL) and K2C03(253 mg, 1.83 mmol), was added Mel (354 mg,
2.49 mmol) at room temperature and the reaction mix was stirred for 24 h at room
temperature. The reaction mix was poured into water and extracted with ethyl
acetate. The organic layer was separated, washed with water, dried and
concentrated to give 2-cyano-5-methoxy pyridine (175 mg, 78% yield).
[0172] The 2-cyano-5-methoxy pyridine (170 mg, 1.26 mmol) was taken
into 6N HCl (4 mL) and refluxed for 16 hours. The reaction mix was cooled to
room temperature and diluted with water, neutralized, and extracted with ethyl
acetate. The organic layer was washed with water, then brine, and was dried and
concentrated to give crude 5-methoxy-2-nicotinic acid (290 mg).
[0173] In a 100 mL round-bottomed flask fitted with a condenser and a
magnetic stirrer were placed 2'-hydroxy acetophenone (3.56 g, 26.1 mmol),
5-methoxy-2-nicotinic acid (4.0 g, 26.1 mmol) and pyridine (50 mL). POCI3 (4 g,
26.1 mmol) was added slowly with cooling. Then, the reaction mix was stirred for
24 h at room temperature under nitrogen. The reaction mix was poured into ice-
water and was extracted with ethyl acetate. The organic layer was washed with
water, dried, and concentrated to give product (1.76 g, 24% yield). To a solution
of this product (1.76 g, 6.5 mmol) in THF (30 mL), was added potassium
t-butoxide (952 mg, 7.8 mmol) and the reaction mix was stirred for 24 h at room
temperature under nitrogen. The reaction mix was poured into a saturated
solution of NH4CI. The organic layer was separated, washed with water, dried and
concentrated to give crude product, which was purified by using column
chromatography using 50% ethyl acetate in hexane to give the diketone (870 mg,
49% yield). The diketone compound (870 mg, 3.2 mmol) was taken into a mixture
of 48% HCl (1 mL) and acetic acid (10 mL) and heated at 100°C for 1 hours. The
reaction mix was cooled to room temperature, diluted with water, and extracted
with ethyl acetate. The organic layer was washed with water, then brine, and was
dried and concentrated to give the cyclized product (794 mg, 98%). A mixture of
the 4'-methoxy flavone (790 mg, 3.12 mmol) in HI (10 mL) and acetic acid (4 mL)
-59-

was heated at reflux for 6 hours. The reaction mix was cooled to room
temperature, diluted with water, neutralized, and extracted with ethyl acetate to
give crude product. This was purified by column chromatography using 5%
methanol in dichloromethane to give 2-(5-Hydroxy-pyridin-2-yl)-chromen-4-one
(270 mg, 36%); MS (ES) m/z: 240.09 (M+1).
Example 12: 2-Pyridin-4-yl-chromen-4-one

[0174] 2-Hydroxyacetophenone (1.36 g, 10 mmol) and isonicotinyl
chloride hydrochloride (1.78 g, 10 mmol) were dissolved in 20 ml_ anhydrous
pyridine and stirred at room temperature for 15 h under nitrogen. Water (20 ml_)
was added and neutralized to pH 6 with 4N HCI. The formed solid was filtered off,
washed with water and dried to give isonicotinic acid-2-acetyl phenyl ester as a
white powder (2.32 g, 96%). To a solution of isonicotinic acid-2-acetyl phenyl ester
(2.2 g, 9.12 mmol) in 20 mL anhydrous pyridine was added powdered potassium
hydroxide (1.54 g, 27.36 mmol) and stirred at room temperature for 15 h under
nitrogen. Water (50 mL) was added and the pH was adjusted to pH 6 with 4N HCI.
The solid formed was filtered off, washed with water and dried to give a yellow
powder (0.66 g). The aqueous phase was extracted with EtOAc. The organic layer
was washed with brine, dried over anhydrous Na2S04, and concentrated to give a
yellow solid (1.32 g, 60%). The compound (0.64 g, 2.654 mmol) was suspended in
6 mL glacial AcOH. Three drops of cone. HCI was added and the mixture was
stirred at 110°C for 3 hours. The mixture was cooled to room temperature. Water
(20 mL) was added and the mixture was neutralized to pH 6-7 with a 2 N NaOH
solution. The white precipitate formed was filtered off, washed with water and
dried under vacuum to give 2-pyridin-4-yl-chromen-4-one (0.56 g, 94.5%). MS
(ES) m/z: 224.89 (M+1), 223.92 (M); MP 144-145°C.
-60-

Example 13: 2-(6-Hydroxypyridin-3-yl)-chromen-4-one

[0175] In a 100 ml_ round-bottomed flask fitted with condenser and
magnetic stirrer were placed 2'-hydroxy acetdphenone (2.0 g, 14.69 mmol), 2-
methoxy-5-pyridine carboxylic acid (2.0 g, 14.69 mmo!) and pyridine (20 ml_).
POCI3 (2.25 g, 14.69 mmol) was added slowly on cooling. The reaction mixture
was stirred for 24 h at room temperature under nitrogen. The reaction mixture was
poured into ice-water and extracted with EtOAc. The organic layer was washed
with water, dried and concentrated to give product (2.82 g, 70%). To a solution of
this product (2.8 g, 10.33 mmol) in THF (50 ml_) was added potassium t-butoxide
(1.51 g, 12.4 mmol) and the reaction mixture was stirred for 3 h at room
temperature under nitrogen. The reaction mixture was poured into a saturated
aqueous solution of NH4CI. The organic layer was separated, washed with water,
dried and concentrated to give crude diketone (2.8 g, 99%). The diketone (2.8 g,
10.33 mmol) was dissolved in a mixture of 36% HCI (2 ml_) and AcOH (25 mL)
and heated at 100°C for 1 hours. The reaction mixture was cooled to room
temperature, diluted with water and extracted with EtOAc. The organic layer was
washed with water, brine, dried and concentrated to give the crude cyclized
product (1.96 g, 74%). A mixture of the cyclized product (500 mg, 1.97 mmol) and
pyridinium hydrochloride (5 g) was heated at 190°C for 1 hour. The reaction
mixture was cooled to room temperature, diluted with water, neutralized with
NaHC03 and filtered to give 2-(6-hydroxypyridin-3-yl)-chromen-4-one (480 mg,
98%). MS (ES) m/z: 240.92 (M+1), 239.89 (M); MP 296-297°C.
Example 14: 2-(4-Hydroxy-phenyl)-1H-quinolin-4-one
-61 -


[0176] In a 50 mL round-bottomed flask fitted with a condenser and a
magnetic stirrer were placed 2-amino acetophenone (1.0 g, 7.4 mmol), THF
(15 mL) and Et3N (2.39 g, 23.6 mmol). To the solution, p-methoxy benzoyl
chloride (1.32 g, 7.76 mmol) in THF (15 mL) was added slowly at 0°C and stirred
for 30 min at OX.Then the reaction mix was stirred for 24 h at room temperature
under nitrogen. The reaction mix was poured into ice-water. The precipitate was
collected and the crude product was purified by column chromatography using
25% ethyl acetate in hexane to give 1.865 g of product (93% yield). To a
suspension of this product (0.865 g, 3.2 mmol) in t-butanol (12 mL), was added
potassium t-butoxide (1.57 g, 12.8 mmol) and the reaction mix was heated to
~70°C for -24 h under nitrogen. The mixture was then cooled to room
temperature and poured into 30 mL of a saturated solution of NH4CI. The solids
were collected and purified by column chromatography using 10% methanol in
dichloromethane to give 398 mg of product (49% yield). This methoxy compound
(375 mg, 1.5 mmol) was taken into 48% HBr (15 mL) and refluxed for 16 hours.
The solvent was removed at reduced pressure. The solids were taken into water
and neutralized with NaHCO3. Solids were collected and purified by column
chromatography using 5% methanol in dichloromethane to give 350 mg of product
(98% yield). MS (ES): m/z: 238.1 (M+1).
-62-
Example 15: 4-lsoquinolin-3-vl-phenol


[0177] To a solution of 2-bromobenzaldehyde (1.85 g, 10 mmol) and 4-
methoxyphenyl acetylene (1.58 g, 12 mmol) in 40 ml_ of triethylamine were added
dichlorobis(triphenylphosphine) palladium(ll) (140 mg, 2 mol%) and copper(l)
iodide (20 mg, 1 mol%). The reaction mixture was heated at 50°C under nitrogen
for 3 hours. The reaction mixture was cooled to room temperature and the
ammonium salt was removed by filtration. The filtrate was concentrated under
reduced pressure. Purification of the crude compound by column chromatography
(SilicaGel 230-400 mesh; 10% ethyl acetate in hexanes as eluent) afforded of 2-
(4-methoxy phenylethynyl) benzaldehyde (2.1 g, 89%).
[0178] 2-(4-Methoxy phenylethynyl) benzaldehyde (2.06 g, 8.73 mmol)
and t-butylamine (3.83 g, 52.4 mmol) were stirred under nitrogen for 24 h at room
temperature.TrTe resulting mixture was extracted with ether and the organic layer
was dried over anhydrous Na2S04, concentrated to give the imine (2.4 g, 94%)
which was used in the next step without further purification. To a solution of this
imine (2.39 g, 8.2 mmol) in 100 mL anhydrous DMF was added (0.156 g, 0.82
mmol) copper(l) iodide and flushed with nitrogen. The reaction mixture was
heated at 100°C for 4 hours. The mixture was cooled to room temperature, and
diluted with ether (200 mL). The organic layer was washed with saturated
aqueous ammonium chloride (3x100 mL). The organic layer was dried over
anhydrous Na2S04 and concentrated to give the crude compound as a dark
colored solid. Purification by column chromatography (SilicaGel 230-400 mesh;
10% ethylacetate in hexanes as eluent) afforded 3-(4-methoxyphenyl)isoquinoline
(1.064 g, 55%) as a white solid. The 3-(4-methoxyphenyl)isoquinoline (1.05 g,
4.47 mmol) was suspended in 30 mL hydroiodic acid and 12 mL of acetic acid
was added. The reaction mixture was stirred at 110°C for 2 h, then cooled to room
temperature. The precipitate formed was filtered off, washed with acetic acid (2x5
mL) and dried under vacuum to give a yellow solid. The crude compound was
purified by triturating with 5% methanol in ether to give 4-isoquinolin-3-yl-phenol
(0.83 g, 84%) as a white powder. MS (ES) m/z: 222.89 (M+1), 221.86 (M); MP
218-219°C.
-63-

Example 16: 7-(3-Fluoro-4-hydroxyphenyl)-6-methyl-1,6-naphthyridin-5(6H)-one

[0179] A suspension of 2-methyl nicotinic acid (1.5 g, 10.94 mmol) in DCM
(30 ml_), triethylamine (1.16 g, 11.48 mmol) and oxalyl chloride (2.77 g, 21.87
mmol) were stirred at room temperature for 16 hours. The solvent and excess of
oxalyl chloride were removed at reduced pressure. The solid-vvas-dissolved in
DCM (10 ml_) and methylamine hydrochloride (1.02 g, 32.81 mmol) was added on
cooling followed by stirring at room temperature for 4 hours. The solvent was
removed and the crude product was purified by chromatography by using 5%
MeOH in DCM to give 1.4 g of the amide product (95%). To a solution of the
amide (1.35 g, 8.99 mmol) in THF (25 mL), was slowly added n-butyl lithium (8.3
ml_, 20.68 mmol, 2.5 M solution in hexane) under nitrogen with cooling (ice-salt
bath), maintaining the temperature below 20°C. After addition, the mixture was
stirred for 1 h at 0°C. The mixture was cooled to -50°C and a solution of 4-
methoxy-3-fluoro benzonitrile (1.63 g, 10.79 mmol) in THF (10 mL) was added
quickly. The cooling bath was removed and the mixture was allowed to warm to
room temperature. Saturated NH4CI solution was added under cooling, and the
layers were separated. The organic layer was washed with water, brine, and dried
over Na2SO4. After concentration, the crude product was purified by
chromatography using 5% MeOH in DCM to give 918 mg of the enamine (34%).
To a suspension of the enamine (400 mg, 1.33 mmol) in EtOH (15 mL) was added
cone. HCI (2 mL). The mixture was heated at 80°C for 2 hours. The reaction
mixture was cooled to room temperature and the solvent was removed to give 400
mg of crude methoxy compound (94%). In a 50 mL flask were placed the
methoxy compound (400 mg, 1.40 mmol) and pyridinium hydrochloride (6 g),
followed by heating of the mixture at 190°C for 4 hours. The flask was then
cooled to room temperature, diluted with water, neutralized with NaHC03 and the
-64-

solid was filtered to afford 160 mg of 7-(3-fluoro-4-hydroxyphenyl)-6-methyl-1,6-
naphthyridin-5(6H)-one (42%). MS (ES) m/z: 271.97 (M+1), 270.96 (M); MP 182-
184°C.
Example 17: 2-Fluoro-4-(5-methoxy-1-(methyIamino)isoquinoIin-3-yl)phenol

[0180] To a suspension of 2-methyl-3-methoxy benzoic acid (2.0 g, 12.03
mmol) in CH2CI2 (30 ml_), oxalyl chloride (3.05 g, 24.07 mmol) was added and
stirred at room temperature for 16 hours. The solvent and excess of oxalyl
chloride were removed at reduced pressure. The solid was dissolved in CH2CI2
(10 ml_) and methyl amine (1.12 g, 36.1 mmol) was added on cooling and the
mixture was stirred at room temperature for 4 hours. The solvent was removed
and the crude product was purified by chromatography using 5% methanol in
CH2CI2 to give the amide product (1.67 g, 78%). To a solution of the amide (946
mg, 5.28 mmol) in THF (20 mL) was added n-butyl lithium (4.85 ml_, 12.14 mmol,
2.5 M solution in hexane) was added slowly under nitrogen with cooling (ice-salt
bath) maintaining temperature below -20°C. After completion of addition, the
mixture was stirred for 1 h at 0°C, then cooled to -50°C and a solution of 4-0-
TBDMS-3-fluoro benzonitrile (1.46 g, 5.8 mmol) in THF (10 mL) was added
quickly. The cooling bath was removed and the reaction mixture was allowed to
warm to room temperature. Saturated NH4CI solution was added under cooling.
The organic layer was washed with water, brine, dried over Na2S04and
concentrated to give the crude product, which was purified by chromatography
using 5% methanol in CH2CI2, to give two products: an enamine (260 mg) and a
cyclized product (450 mg). To a suspension of the enamine (400 mg, 1.33 mmol)
in ethanol (15 mL), cone. HCI (2 mL) was added and heated at 80°C for 2 hours.
The reaction mixture was cooled to room temperature and the solvent was
removed and neutralized by NaHC03 to give 2-fluoro-4-(5-methoxy-1-
-65-

(methylamino)isoquinoIin-3-yl)phenol (150 mg, 83%). MS (ES) m/r. 300.01
(M+1), 299.00 (M); MP 185-187°C.
Example 18: 3-(3-Fluoro-4-hydroxyphenyl)-5-methoxyisoquinolin-1 (2H)-one

[0181] To a suspension of 2-methyl-3-methoxy benzoic acid (2.0 g, 12.03
mmol) in DCM (30 ml_), oxalyrchloride (3.05 g, 24.07 mmol-) was added and
stirred at room temperature for 16 hours. The solvent and excess of oxalyl
chloride were removed at reduced pressure. The solid was dissolved in DCM (10
mL) and methyl amine (1.12 g, 36.1 mmol) was added on cooling and the mixture
was stirred at room temperature for 4 hours. The solvent was removed and the
crude product was purified by chromatography using 5% MeOH in DCM to give
the amide product (1.67 g, 78%). To a solution of the amide (946 mg, 5.28 mmol)
in THF (20 ml_) was added n-butyl lithium (4.85 mL, 12.14 mmol, 2.5 M solution in
hexane) was added slowly under nitrogen with cooling (ice-salt bath) maintaining
temperature below -20°C. After completion of addition, the mixture was stirred for
1 h at 0°C, then cooled to -50°C and a solution of 4-0-TBDMS-3-fluoro
benzonitrile (1.46 g, 5.8 mmol) in THF (10 mL) was added quickly. The cooling
bath was removed and the reaction mixture was allowed to warm to room
temperature. Saturated NH4CI solution was added under cooling. The organic
layer was washed with water, brine, dried over Na2S04 and concentrated to give
the crude product, which was purified by chromatography using 5% MeOH in
DCM, to give two products: an enamine (260 mg) and a cyclized product (450
mg). To a suspension of the cyclized product (450 mg, 1.1 mmol) in EtOH (15
mL), cone. HCI (2 mL) was added and heated at 60°C for 3 hours. The reaction
mixture was cooled to room temperature and the solvent was removed and
purified by chromatography using 5% MeOH in DCM to give 85 mg of product
(26%). MS (ES) m/z: 286.11; MP 289-291°C.
-66-

Example 19: 3-(4-Hydroxyphenyl)-6,8-dimethoxyisoquinolin-1 (2H)-one

[0182] To a suspension of 2-methyl-4,6-dimethoxy benzoic acid (2.8 g,
14.27 mmol) in CH2CI2 (30 ml_), oxalyl chloride(3.62 g, 28.54 mmol) was added
and the mixture was stirred at room temperature for 16 hours. The solvent and
excess of oxalyl chloride were removed at reduced pressure. The solid was
dissolved in CH2CI2 (10 ml_) and methyl amine hydrochloride (1.33 g, 42.81 mmol)
was added on cooling and the mixture was stirred at room temperature for 4
hours. The solvent was removed and the crude product was purified by
chromatography by using 5% methanol in CH2CI2, to give 1.3 g of the amide
intermediate in 43% yield. To a solution of the amide intermediate (1.29 g, 6.16
mmol) in THF (30 ml_), n-butyl lithium (5.6 mL, 14.18 mmol, 2.5 M solution in
hexane) was added slowly under nitrogen with cooling( ice-salt bath) maintaining
the temperature below 20°C. The mixture was stirred for 1 h at 0°C, then cooled to
-50°C and a solution of 4-O-TBDMS-benzonitrile (1.58 g, 6.78 mmol) in THF (10
mL) was added quickly. The cooling bath was removed and allowed to warm to
room temperature and stirred for 16 h at room temperature. Saturated aqueous
NH4CI solution was added with cooling, and the layers were separated. The
organic layer was washed with water, brine, dried over Na2S04and concentrated
to give the crude intermediate, which was purified by chromatography using 5%
methanol in CH2CI2, to give two products (1) 678 mg of isoquinoline in 26% yield
and (2) 780 mg of quinalone product in 27% yield. To a suspension of the above
quinalone product (2) (780 mg, 1.65 mmol) in ethanol (20 mL), cone. HCI (2 mL)
was added and the mixture was heated at 70°C for 2 hours. The reaction mixture
was cooled to room temperature and the solvent was removed and purified by
chromatography using 5% methanol in CH2Cl2 to give 3-(4-hydroxyphenyl)-6,8-
-67-

dimethoxyisoquinolin-1(2H)-one (215 mg, 44 %). MS (ES) m/z: 297.93 (M); MP
245-247°C.
Example 20: 2-(4-Hydroxy-phenyl)-[1,4]naphthoquinone

[0183] An example compound, 2-(4-hydroxy-phenyl)-[1,4]naphthoquinone
was synthesized in the following way. To a mixture of 2-bromo-1, 4-
naphthoquinone (1.0 g, 4.22 mmol), 4-hydroxy phenyl boronic acid (640 mg, 4.64
mmol), potassium phosphate (3.135 g, 14.76 mmol), tri cyclo hexyl phosphine
(118 mg, 0.422 mmol), toluene (20 ml_) and water (1 mL) was added palladium
acetate (47 mg, 0.21 mmol) under nitrogen. The reaction mix was heated to
~100°C for 3 h and then cooled to room temperature. Water was added and the
mixture was extracted with ethyl acetate. The organic layer was separated,
washed with water, brine, dried and concentrated to give crude product, which
was purified by column chromatography, using 10% ethyl acetate in hexane to
give (480 mg, 45% yield) of 2-(4-Hydroxy-phenyl)-[1,4]naphthoquinone; MS (ES)
m/z: 251.03 (M+1).
Example 21: 3-(4-Hydroxyphenyl)-2H-isoquinolin-1-one

[0184] To a solution of n-methyl-o-toluamide (2.0 g, 13.4 mmol) in THF
(30 mL), n-butyl lithium (12.3 mL, 30.8 mmol, 2.5 M solution in hexane) was
-68-

added slowly under nitrogen with cooling (ice-salt bath) maintaining the
temperature below 20°C. After addition, the mixture was stirred for 1 h at 0°C,
then cooled to -50°C. A solution of 4-methoxy benzonitrile (2.14 g, 16.08 mmol) in
THF (5 mL) was added quickly. The cooling bath was removed and the reaction
was allowed to warm to room temperature. A saturated aqueous NH4CI solution
was added during cooling, and the solid was isolated by filtration to give the
methoxy compound (2.2 g, 65%). The methoxy compound (750 mg, 2.98 mmol)
was dissolved in a 50 mL flask and pyridinium hydrochloride (10 g) was added.
The mixture was heated at 190°C for 2 h, then cooled to room temperature . The
reaction was then diluted with water, neutralized with NaHC03 and the solid was
isolated by filtration to give 600 mg of 3-(4-hydroxyphenyl)-2H-isoquinolin-1-one
(84%). MS (ES) m/z: 238.92 (M+1), 237.89 (M); MP 239-241 °C.
Example 22: 2-Phenyl-4H-pyrano[2,3-b]pyridin-4-one

[0185] In a 250 mL dry round bottom flask with a reflux condenser and
magnetic stirrer was placed with 2-chloro-3-ethyl nicotinate (12.0 g, 64.7 mmol) in
dry methanol (200 mL), and CH3ONa (21 mL, 97.0 mmol, 25% in methanol) were
added slowly and the reaction mixture was refluxed for 16 hour. The reaction
mixture was cooled to room temperature and quenched by addition of a saturated
aqueous NH4CI solution and extracted with ethyl acetate. The combined organic
layers were washed with water, brine, dried over Na2S04 and concentrated to give
2-methoxy-3-methyl nicotinate (10.0 g, 93%). In a dry 500 mL round bottom flask
NaH (549 mg, 13.7 mmol, 60% in mineral oil) was added in DMF (10 mL).
Acetophenone (1.5 g, 12.5 mmol) in dry DMF (10 mL) was added drop-wise at
0°C in 30 min. The reaction mixture was stirred for 1 h at room temperature. 2-
Methoxy-3-methyl nicotinate (2.08 g, 12.5 mmol) dissolved into dry DMF (10 mL)
was added slowly on cooling. After addition the mixture was stirred for 16 h at
-69-

room temperature. The reaction mixture was quenched by addition of a saturated
aqueous NH4CI solution and diluted with water. The solid was filtered off, washed
with water and dried to give the diketo product (2.94 g, 92%). Poly phosphoric
acid (15.0 g) was heated at 90°C and the diketo compound (1.5 g, 3.50 mmol)
was added slowly and heated at 90°C for 1 hours. The reaction mixture was
cooled to room temperature and diluted with water. The solid was separated by
filtration, washed with water and dried to give pure 2-phenyl-4H-pyrano[2,3-
b]pyridin-4-one (655 mg, 50%); MS (ES) m/z: 224.94 (M+1), 223.95 (M); MP 103-
105°C
Example 23: 2-(4-(hydroxymethyl)phenyl)-4H-pyrano[2,3-b]pyridin-4-one

[0186] In a 250 ml_ dry round bottom flask with reflux condenser and
magnetic stirrer was placed 2-chloro-3-ethyl nicotinate (12.0 g, 64.7 mmol) in dry
methanol (200 ml_), and CH3ONa (21 ml_, 97.0 mmol, 25% in methanol) were
added slowly and the reaction mixture was refluxed for 16 hour. The reaction
mixture was cooled to room temperature and quenched by addition of a saturated
aqueous NH4CI solution and extracted with ethyl acetate. The combined organic
layers were washed with water, brine, dried over Na2SO4 and concentrated to give
2-methoxy-3-methyl nicotinate (10.0 g, 93%). In a dry 250 ml_ round bottom flask
NaH (1.68 g, 41.0 mmol, 60% in mineral oil) was added in DMF (20 mL). 4'-Methyl
acetophenone (5 g, 37.3 mmol) in dry DMF (10 mL) was added dropwise at 0°C in
30 min. The reaction mixture was stirred for 1 h at room temperature. 2-Methoxy-
3-methyl nicotinate (6.23 g, 37.3 mmol) dissolved in dry DMF (10 mL) was added
slowly on cooling. After addition the mixture was stirred for 16 h at room
temperature. The reaction mixture was quenched by addition of a saturated
aqueous NH4CI solution and diluted with water. The solid was filtered off, washed
with water and dried to give the diketo product (9.36 g, 92.5%). Poly phosphoric
acid (30.0 g) was heated at 90°C and the diketo compound (4.36 g, 16.1 mmol)
-70-

was added slowly and heated at 90°C for 1 hours. The reaction mixture was
cooled to room temperature and diluted with water. The solids was separated by
filtration, washed with water and dried to give 2-p-tolyl-4H-pyrano[2,3-b]pyridin-4-
one (3.38 g, 89%). To a solution of 2-p-tolyl-4H-pyrano[2,3-b]pyridin-4-one (1.0 g,
4.2 mmol) in CCI4 (50 mL), NBS (788 mg, 4.44 mmol) was added under nitrogen,
and heated under reflux for 4 h in presence of 600 w light. The reaction mixture
was cooled to room temperature and filtered. The solids were dried and washed
with water to give the bromide compound (698 mg, 52%). To a solution of the
bromide compound (698 mg, 2.20 mmol) in DMF (20 mL), potassium acetate (649
mg, 6.62 mmol) was added. The mixture was heated at 100°C for 1 hours. The
reaction mixture was diluted with water and extracted with ethyl acetate. The
combined organic layers were washed with water, brine, dried over Na2S04 and
concentrated to give the crude acetyl flavone (597 mg, 92%). To a solution of
acetyl flavone (597 mg, 2.0 mmol) in methanol (15 mL), K2C03 (840 mg, 6.07
mmol) was added and stirred for 2 h at room temperature. The solvent was
removed and the product was taken into water and neutralized by dilute HCI. The
solid was isolated by filtration, washed with water and purified by chromatography
using 5% MeOH in dichloromethane to give 2-(4-(hydroxymethyl)phenyl)-4H-
pyrano[2,3-b]pyridin-4-one (300 mg, 59%); MS (ES) m/z: 254.89 (M+1), 253.88
(M);MP218-219°C
Example 24: 2-(4-hydroxy-3,5-dimethylphenyl)-4H-pyrano[2,3-b]pyridin-4-one

[0187] Ethyl-2-chloronicotinate (11.14 g, 60 mmol) was dissolved in
anhydrous methanol (60 mL). Sodium methoxide (18 mL, 25 wt-% in methanol)
was added slowly at room temperature under nitrogen. The reaction mixture was
stirred under reflux for 15 hours. Methanol was removed under vacuum. The
residue was dissolved in ethyl acetate (200 mL). The organic layer was washed
-71-

with a saturated aqueous NH4CI solution (1x100 ml_) and brine (50 m!_). Dried
over anhydrous Na2SO4. Removal of solvent gave ethyl-2-methoxynicotinate as
yellow oil (9.88 g, 91%). To a solution of 3,5-dimethyl-4-hydroxyacetophenone
(2.46 g, 15 mmol) in anhydrous DMF (75 ml_) was added imidazole (3.27 g, 48
mmol) and terf-butyldimethylsilylchloride (2.71 g, 18 mmol). The reaction mixture
was stirred at room temperature under nitrogen for 15 hours. Water (200 mL) was
added. The mixture was extracted with ethyl acetate (200 mL). The organic layer
was washed with water (2x100 mL) and brine (100 mL), and dried over anhydrous
Na2S04. Removal of solvent gave 3,5-demthyl-4-ferf-butyldimethylsilyloxy
acetophenone as a colorless oil in quantitative yield (4.4 g). To a stirred solution
of 3,5-demthyl-4-ferf-butyldimethylsilyloxy acetophenone (1.58 g, 5.6 mmol) in
anhydrous THF (15 mL) was added lithium bis(trimethylsilyl) amide (6.8 mL, 1.0M
solution in THF) at -40°C over a period of 15 min. under nitrogen. Stirring was
continued at -40°C for 15 min. A solution of ethyl-2-methoxynicotinate in
anhydrous THF (15 mL) was added slowly. Stirring was continued at -40°C for 10
min. The mixture was allowed to warm to room temperature. Stirring was
continued for another 15 h at room temperature. The reaction mixture was diluted
with ethyl acetate (200 mL). A saturated aqueous NH4CI solution (50 mL) was
added. The organic layer was separated and dried over anhydrous Na2S04.
Removal of solvent gave the desired crude compound (2.4g) which was used in
next step without purification. The above compound (2.31 g, 5.6 mmol) and
pyridinium hydrochloride (6.47 g, 56 mmol) was mixed together and stirred at
190°C for 3 hours. The mixture was cooled to room temperature. Water (100 mL)
was added. The solid was filtered off, washed with water and dried under
vacuum. The crude product was purified by column chromatography (SilicaGel
230-400 mesh; 2% methanol in CH2CI2 as eluent) to give 2-(4-hydroxy-3,5-
dimethylphenyl)-4H-pyrano[2,3-b]pyridin-4-one (0.598 g, 40% yield over two
steps); MS (ES) m/z: 268.91 (M+1), 267.88 (M); MP 295-297°C
-72-

Example 25: 2-(pyridin-3-yl)-4H-chromen-4-one

[0188] To a solution of nicotinic acid hydrochloride (0.5 g, 3.1 mmol) in
CH2CI2 (200 mL) at room temperature was added oxalyl chloride (0.42 mL, 4.8
mmol) and three drops of DMF. The reaction mixture was stirred at room
temperature for 1 h and then concentrated using a rotary evaporator. The
resulting residue was re-dissolved in toluene (50 mL).and then again concentrated
using a rotary evaporator to afford nicotinic acid chloride hydrochloride (0.5 g,
90%). To a solution of 2'-hydroxyacetophenone (0.38 g, 2.8 mmol) in THF (50 mL)
at room temperature was added nicotinic acid chloride hydrochloride (0.5 g, 2.8
mmol) and triethylamine (1.2 mL, 8.6 mmol). The reaction mixture was stirred at
room temperature for 2 hours. The reaction was quenched with water (50 mL),
extracted with CH2CI2 (3x100 mL), concentrated using a rotary evaporator. The
residue was purified by column chromatography (hexane: ethyl acetate 2:1) to
provide the corresponding ester (0.42 g, 62%). A solution of the above ester
(0.42 g, 1.73 mmol) in THF (50 mL) was mixed with f-BuOK (0.25 g, 2.25 mmol)
and was stirred at room temperature for 16 hours. The reaction was quenched
with water (50 mL) and the aqueous was acidified with HCI (0.5 N) to pH=6. The
reaction mixture was extract with CH2CI2 (3*100 mL), concentrated using a rotary
evaporator, trituration in hexanes to afford a solid. This solid was collected by
filtration and washed with hexanes to provide the diketone (0.3g, 71%). A solution
of the above diketone (0.3 g, 1.25 mmol) in HOAc (50 mL) and HCI (cone, 1 mL)
was stirred at reflux for 2 hours. The solvent was removed using a rotary
evaporator. The residue was purified by column (hexane: ethyl acetate: MeOH
3:3:1) to provide 2-(pyridin-3-yl)-4H-chromen-4-one as a light yellow solid
(0.202 g, 73%); MS (ES) m/z: 224.90 (M+1), 223.92 (M); MP 122.8-124.0°C
- 73 -

Example 26: 7-((dimethylamino)methyl)-2-(4-hydroxyphenyl)-4H-pyrano[2,3-
b]pyridin-4-onedihydrochloride

[0189] In a 250 ml_ dry round bottom flask with reflux condenser and
magnetic stirrer was placed with 2-chloro-6-methyl-3-methyl nicotinate (5.3 g, 28.6
mmol) in dry methanol (30 mL), and 'CH3ONa (9.2 mL, 42.8 mmol, 25% in
methanol) were added slowly and the reaction mixture was refluxed for 16 hour.
The reaction mixture was cooled to room temperature and quenched by addition
of a saturated aqueous NH4CI solution and extracted with ethyl acetate. The
combined organic layers were washed with water, brine, dried over Na2S04 and
concentrated to give 2-methoxy-6-methyl-3-methyl nicotinate (4.37 g, 84%). In a
dry 250 mL round bottom flask NaH (637 mg, 26.5 mmol, 60% in mineral oil) was
added in DMF (20 mL). 4'-Methoxy acetophenone (3.62 g, 24.1 mmol) in dry DMF
(10 mL) was added dropwise at 0°C over 30 min. The reaction mixture was stirred
for 1 h at room temperature. 2-Methoxy-6-methyl-3-methyI nicotinate (4.37 g,
24.1 mmol) dissolved in dry DMF (10 mL) was added slowly on cooling. After
addition the mixture was stirred for 16 h at room temperature. The reaction
mixture was quenched by addition of saturated aqueous NH4CI solution and
diluted with water. The solids were filtered off, washed with water and dried to give
the diketo product (6.18 g, 86 %). In a 50 mL flask were placed the diketo
compound (3.0 g, 10.1 mmol) and pyridinium hydrochloride (25 g). The mixture
was heated at 190°C for 4 hours. The flask was cooled to room temperature,
diluted with water, neutralized with NaHC03 and the solids were filtered off, dried
and purified by chromatography using 5 % MeOH in CH2CI2 to give the desired
intermediate (1.15 g , 46%). In a 50 mL round-bottomed flask fitted with
condenser and magnetic stirrer were placed the desired intermediate (1.05 g, 4.13
mmol), Ac20 (463 mg, 4.54 mmol), pyridine (10 mL). The reaction mixture was
stirred for 16 h at room temperature. The reaction mixture was poured into water.
The solids were filtered off, washed with water and dried to give the acetylated
-74-

product (1.157 g, 96%). To a solution of acetyl product (1.16 g, 3.92 mmol) in
CCl4(50 mL), NBS (732 mg, 4.11 mmol) was added under nitrogen, and the
reaction mixture was heated under reflux for 4 h in presence of 600 w light. The
reaction mixture was cooled to room temperature and filtered. The solids were
dried and washed well with water. The crude product was purified by
chromatography using 25 % ethyl acetate in dichloromethane to give the bromide
compound (375 mg, 25 %). To a solution of the bromide compound (375 mg, 1.00
mmol) in CH3CN (10 mL), was added dimethyl amine (181 mg, 4.02 mmol, 2 M
solution in THF). The mixture was stirred at room temperature for 1 hours. The
solvent was removed and the crude product was purified by chromatography
using 5% MeOH in dichloromethane to give the free base. The free base was
dissolved in dichibromethane (10 mL) and HCl solution in ether (1 N, 5 mL) was
added. The solvent was removed and solids were dried to give 7-
((dimethylamino)methyl)-2-(4-hydroxyphenyl)-4H-pyrano[2,3-b]pyridin-4-one as
the dihydrochloride (275 mg, 74%). MS (ES) m/z: 296.94 (M); MP 205°C at
decomposition
Example 27: 2-(4-(2-(dimethylamino)ethoxy)phenyl)-4H-pyrano[2,3-b]pyridin-4-
one dihydrochloride

[0190] In a 500 mL dry round bottom flask with reflux condenser and
magnetic stirrer was placed 2-chloro-3-ethyl nicotinate (40.0 g, 215.5 mmol) in
methanol (200 mL), and CH3ONa (65 mL, 301.7 mmol, 25% in methanol) was
added slowly and the reaction mixture was refluxed for 16 hour. The reaction
mixture was cooled to room temperature, quenched by addition of saturated
NH4CI solution and extracted by ethyl acetate. The combined organic layer was
washed well with water, brine, dried over Na2S04 and concentrated to give 2-
methoxy-3-methyl nicotinate (35 g, 97% yield). In a dry 500 mL round bottom
flask sodium hydride (9.21 g, 230.3 mmol, 60%) was added in DMF (100 mL). 4-
-75-

Methoxyacetophenone (31.5 g, 209 mmol) in dry DMF (50 mL) was added
dropwise at 0°C over 30 min. The reaction mixture was stirred for 1 h at room
temperature. 2-Methoxynicotinic acid methyl ester (35 g, 209 mmol) dissolved in
dry DMF (50 mL) was added slowly on cooling. After addition the mixture was
stirred for 16 h at room temperature. The reaction mixture was quenched by
addition of a saturated aqueous NH4Cl solution and diluted with water. The solids
were filtered off, washed with water and dried to give the diketo product (56.7 g,
95 %). The above diketo compound (56.7 g, 199 mmol) and pyridinium
hydrochloride (345 g) were placed in a 1000 mL round bottom flask and the
mixture was heated at 190°C for 5 hours. The reaction mixture was cooled to
room temperature and diluted with water. The solids were separated by filtration
and purified by column chromatography using 5% methanol in CH2GI2 to give 2-
(4-Hydroxy-phenyl)-pyrano[2,3-b]pyridin-4-one (23.25 g, 48.8%). 2-(4-Hydroxy-
phenyl)-pyrano[2,3-b]pyridin-4-one (0.48 g, 2.0 mmol) was suspended in
anhydrous THF (25 mL). Triphenyl phosphene (0.577 g, 2.2 mmol), N,N-
dimethylaminoethanol (0.213 g, 2.4 mmol) and /S/,A/-diisopropylethylamine (0.37 g,
3.0 mmol), were added. To the stirred solution was added diethylazodicarboxylate
(0.383 g, 2.2 mmol). After the addition of DEAD, the reaction mixture became a
clear solution. The reaction mixture was stirred at room temperature overnight.
Additional triphenyl phosphene (0.288 g, 1.1 mmol), A/,A/-dimethylaminoethanol
(0.107 g, 1.2 mmol); A/,A/-diisopropylethylamine (0.185 g, 1.5 mmol), and
diethylazodicarboxylate (0.191 g, 1.1 mmol) were added and stirring was
continued for 15 hours. The solvent was removed under vacuum. The crude
material was purified by column chromatography (Silica Gel 230-400 mesh; 2-5%
methanol in CH2CI2 as eluent) to give 2-[4-(2-dimethylamino ethoxy) phenyl]
pyrano[2,3-b]pyridine-4-one as white solid (0.445 g, 72%). The above compound
(0.2 g, 0.644 mmol) was dissolved in anhydrous Dichloromethane (10 mL). HCI in
ether (3 mL, 1.0 M) was added dropwise. A yellow precipitate was formed. The
reaction mixture was stirred at room temperature for 30 min. under nitrogen. The
solvent was removed and the crude compound was triturated with ether to give 2-
(4-(2-(dimethylamino)ethoxy)phenyl)-4H-pyrano[2,3-b]pyridin-4-one
dihydrochloride (0.24 g, 97%) as a pale yellow solid. MS (ES) m/r. 311.98 (M+1),
310.94 (M); MP 236-238°C.
- 76 -

Example 28: 2-(4-hydroxy-3-(thiophen-2-yl)phenyl)-4H-pyrano[2,3-b]pyridin-4-one

[0191] To a solution of 4-hydroxyacetophenone (4.0 g, 30 mmol) in 50%
(v/v) of ammonium hydroxide (250 ml_) at room temperature was quickly added a
solution of potassium iodide (24.2 g, 146 mmol) and iodine (7.66 g, 30 mmol) in
water (300 ml_). The resulting mixture was stirred at room temperature for i4
hours and then passed through a celite pad. The filtrate was cooled to 10°C and
acidified slowly with HCI (12 N) to pH = 1. The yellow precipitate was collected by
filtration, washed with water to get 4-hydroxy-3-iodoacetophenone (6.3 g, 80%). A
solution of 4-hydroxy-3-iodoacetophenone (3 g, 11.5 mmol) and 2-
thiophenylboronic acid (1.46 g, 11.5 mmol) in DMF (50 mL) was mixed with
potassium carbonate (3.16 g, 22.9 mmol) and Pd(dppf)2 (0.25 g, 0.344 mmol).
The mixture was stirred at 90°C for 14 hours, cooled to room temperature and
passed through a celite pad. The filtrate was diluted with water and extracted with
EtOAc (3x100 mL). The residue after concentration was purified by column (Si02,
Hexanes / EtOAc = 4:1) to provide 4-hydroxy-3-(2-thiophenyl)acetophenone (1.1
g, 44%) as a light yellow solid. To a solution of 4-hydroxy-3-(2-
thiophenyl)acetophenone (0.5 g, 2.29 mmol) in THF (50 mL) at -78°C was added
LDA in heptane-THF (2.6 mL, 4.7 mmol) and the solution was stirred for 1 hours.
2-Chloronicotinyl chloride (0.202 g, 1.15 mmol) was added and the resulting
mixture was stirred at -78°C for 1 h and 1 h at room temperature. The reaction
was quenched with aqueous HCI (0.5 N) and extracted with CH2CI2 (x3*100 mL).
The residue after concentration was purified by column (Si02l Hexanes / EtOAc =
2:1) to provide the corresponding diketone (0.31 g, 76%). The above diketone
(0.28 g, 0.78 mmol) was dissolved in HOAc (50 mL) and stirred at 110°C for 2
hours. It was poured into icy water. The solid was collected by filtration, washed
with CH2CI2 to afford 2-(4-hydroxy-3-(thiophen-2-yl)phenyl)-4H-pyrano[2,3-
-77-

b]pyridin-4-one (0.146 g, 58%) as a grey solid; MS (ES) m/z: 322.93 (M+1),
321.93 (M); MP 273.5-275°C.
Example 29: 2-(2,6-dimethyI-4-(4-oxo-4H-pyrano[2,3-b]pyridin-2-
yl)phenoxy)acetic acid

[0192] Ethyl 2-chloronicotinate (11.14 g, 60 mmol) was dissolved in
anhydrous methanol (60 ml_). Sodium methoxide (18 ml_, 25 wt% in methanol)
was added slowly at room temperature under nitrogen. The reaction mixture was
stirred under reflux for 15 hours. Methanol was removed under vacuum. The
residue was dissolved in ethyl acetate (200 mL). The organic layer was washed
with a saturated aqueous NH4CI solution (1*100 mL) and brine (50 mL), and dried
over anhydrous Na2S04. Removal of solvent gave ethyl-2-methoxynicotinate (9.88
g, 91 %) as yellow oil. To a solution of 3,5-dimethyl-4-hydroxyacetophenone (2.46
g, 15 mmol) in anhydrous DMF (75 mL) were added imidazole (3.27 g, 48 mmol)
and terf-butyldimethylsilylchloride (2.7 g, 18 mmol). The reaction mixture was
stirred at room temperature under nitrogen for 15 hours. Water (200 mL) was
added. The mixture was extracted with ethyl acetate (200 mL). The organic layer
was washed with water (2*100 mL) and brine (100 mL), and dried over anhydrous
Na2S04. Removal of solvent gave 3,5-demthyl-4-teAf-butyldimethylsilyloxy
acetophenone as a colorless oil in quantitative yield (4.4 g). To a stirred solution
of 3,5-demthyl-4-ferf-butyldimethylsilyloxy acetophenone (1.58 g, 5.6 mmol) in
anhydrous THF (15 mL) was added lithium bis(trimethylsilyl) amide (6.8 mL, 1.0 M
solution in THF) at -40°C under nitrogen over a period of 15 min.. Stirring was
continued at -40°C for 15 min. A solution of ethyl-2-methoxynicotinate in
anhydrous THF (15 mL) was added slowly. Stirring was continued at -40°C for 10
min, then allowed to warm to room temperature. Stirring was continued for
another 15 h at room temperature. The reaction mixture was diluted with ethyl
-78-

acetate (200 mL). A saturated aqueous NH4CI solution (50 ml_) was added. The
organic layer was separated and dried over anhydrous Na2S04. Removal of
solvent gave the desired crude compound (2.4 g) which was used in next step
without purification. The above compound (2.31 g, 5.6 mmol) and pyridinium
hydrochloride (6.47 g, 56 mmol) was mixed together and stirred at 190°C for 3
hours. The mixture was cooled to room temperature. Water (100 mL) was added.
The solid was isolated, washed with water and dried under vacuum. The crude
product was purified by column chromatography (SilicaGel 230-400 mesh; 2%
methanol in CH2CI2 as eluent) to give the desired intermediate (0.598 g, 40% over
two steps) as an off-white solid. To a solution of the desired intermediate (0.53 g,
2.0 mmol) in anhydrous DMF (10 mL) sodium hydride (0.88 g, 2.2 mmol) was
added in portions. The reaction mixture was stirred at room temperature for 10
min. Ethyl-2-bromo acetate (0.367 g, 2.2 mmol) was added and stirring was
continued at room temperature for 15 h under nitrogen. Water (30 mL) was added,
and the solid was filtered off, washed with water and dried under vacuum to give
[2,6-dimethyl-4-(4-oxo-4H-pyrano[2,3-b]pyridin-2-yl)phenoxy]aceticacid ethyl
ester (0.69 g, 97%). The above compound (0.35 g, 1.0 mmol) was suspended in
THF (10 mL). An aqueous solution of sodium hydroxide (0.08 g, 2.0 mmol) in
water (1 mL) was added and the mixture was stirred at room temperature for 24 h
(progress of the reaction was monitored by TLC). The solvent was evaporated to
dryness. The crude compound was washed with THF. The residue was dissolved
in water (10 mL) and acidified to pH -2. The formed precipitate was filtered off
and dried under vacuum the crude compound was purified by column
chromatography (Silica Gel 230-400 mesh; 5% MeOH in CH2CI2 as eluent) to give
2-(2,6-dimethyl-4-(4-oxo-4H-pyrano[2,3-b]pyridin-2-yl)phenoxy)acetic acid (0.21 g,
64%) as pale yellow solid; MS (ES) m/z: 326.91 (M+1), 325.90 (M); MP 280°C at
decomposition.
-79-

Example 30: 2-(pyridin-4~yl)-4H-pyrano[2,3-b]pyridin-4-one hydrochloride

[0193] In a dry 250 ml_ round bottom flask NaH (519 mg, 12.98 mmol,
60% in mineral oil) was added in DMF (10 ml_). 4-Acetyl pyridine (1.43 g, 11.8
mmol) in dry DMF (5 ml_) was added dropwise at 0°C over 30 min. The reaction
mixture was stirred for 1 h at room temperature. Methyl 2-methoxynicotinate (1.98
g, 11.8 mmol) dissolved in dry DMF (5 ml_) was added slowly on cooling. After
addition, the mixture was stirred for 16 h at room temperature. The reaction
mixture was quenched by addition of a saturated aqueous NH4CI solution and
diluted with water. The product was extracted with ethyl acetate and the
combined organic layers were washed with water, brine, dried over Na2S04 and
concentrated to give 350 mg of the crude diketone. The diketone (350 mg, 1.36
mmol) and polyphosphoric acid (5 g) were placed in a 50 ml_ flask and the mixture
was heated at 100°C for 1 hours. The reaction flask was cooled to room
temperature, the mixture was diluted with water, neutralized with 1 N NaOH
solution and extracted with ethyl acetate. The combined organic layers were
washed with water, brine, dried over Na2SO4 and concentrated to give the crude
product, which dissolved in CH2CI2 and treated with 2N HCI solution in ether. The
solids were dissolved in CH2CI2 (10 ml_) and 2N HCI solution in ether was added.
The solids were filtered and dried to give 2-(pyridin-4-yl)-4H-pyrano[2,3-b]pyridin-
4-one hydrochloride (134 mg, 38 %); MS (ES) m/z: 224.90 (M); MP 248-250°C.
Example 31:2-(3,5-dimethyl-4-(2-morpholinoethoxy)phenyl)-4H-pyrano[2,3-
b]pyridin-4-one hydrochloride
-80-


[0194] Ethyl-2-chloronicotinate (11.1 g, 60 mmol) was dissolved in
anhydrous methanol (60 ml_). Sodium methoxide (18 mL, 25 wt% in methanol)
was added slowly at room temperature under nitrogen. The reaction mixture was
stirred under reflux for 15h. The methanol was removed under vacuum. The
residue was taken into ethyl acetate (200 mL). The organic layer was washed with
a saturated aqueous NH4CI solution (1x100 mL) and brine (50 mL), and dried over
anhydrous Na2S04. Removal of solvent gave ethyi-2-rfiethoxynicotinate (9.9 g,
91 %) as yellow oil. To a solution of 3,5-dimethyl-4-hydroxyacetophenone (2.5g,
15 mmol) in anhydrous DMF (75 mL) was added imidazole (3.3 g, 48 mmol) and
ferf-butyldimethylsilylchloride (2.7 g, 18 mmol). The reaction mixture was stirred at
room temperature under nitrogen for 15 hours. Water (200 mL) was added. The
mixture was extracted with ethyl acetate (200 mL). The organic layer was washed
with water (2*100 mL), brine (100 mL), and dried over anhydrous Na2S04.
Removal of solvent gave a colorless oil in quantitative yield (4.4 g). To a stirred
solution of the 3,5-dimethyl-4-terf-butyldimethylsilyloxy acetophenone (1.6 g, 5.6
mmol) in anhydrous THF (15 mL) was added lithium bis(trimethylsilyl) amide (6.8
mL, 1.0 M solution in THF) at -40°C over a period of 15 min. under nitrogen. The
stirring continued at -40°C for 15 min. A solution of ethyl-2-methoxynicotinate in
anhydrous THF (15 mL) was added slowly. The stirring was continued at -40°C for
10 min. Then allowed to warm to room temperature and stirred for another 15 h at
room temperature. The reaction mixture was diluted with ethyl acetate (200 mL).
A saturated aqueous NH4CI solution (50 mL) was added. The organic layer was
separated and dried over anhydrous Na2S04. Removal of solvent gave the crude
product (2.4 g), which was used in next step without purification. The above
compound (2.3Tg, 5.6 mmol) and pyridinium hydrochloride (6.5 g, 56 mmol) was
mixed together and stirred at 190°C for 3 hours. The mixture was cooled to room
temperature and water (100 mL) was added. The solid was separated by filtration,
washed with water and dried under vacuum. The crude product was purified by
-81-

column chromatography (SilicaGel 230-400 mesh; 2% methanol in CH2CI2 as
eluent) to give the desired intermediate in (0.6 g, 40% yield from two steps) as an
off-white solid. To a solution of the desired intermediate (0.86 g, 3.2 mmol) in
anhydrous DMF (20 mL) was added sodium hydride (0.180 g, 4.49 mmol, 60%
suspension in mineral oil) in small portions and stirred for 15 min. under nitrogen.
A solution of 1-chloro-2-iodoethane (0.765g, 4.02 mmol) in anhydrous DMF (5 mL)
was added dropwise. The reaction mixture was stirred for 3 days (progress of the
reaction mixture was monitored by TLC). Water (100 mL) was added. The
mixture was extracted with THF and ethyl acetate (1:2,150 mL). The organic layer
was washed with brine (50 mL) and dried over anhydrous Na2S04. The crude
material was purified by column chromatography (Silica Gel 230-400 mesh; 2-5%
MeOH in CH2CI2 as eluent) to give~2-[-(2-chloroethoxy)-3,5-
dimethylphenyl]pyrano[2,3-b]pyridine-4-one (0.4g, 38%) of as a pale yellow solid.
The above compound (0.19 g, 0.58 mmol) was dissolved in anhydrous DMSO (5
mL). Morpholine (0.25 g, 2.9 mmol) and triethylamine (0.29 g, 2.9 mmol) were
added and the reaction mixture was stirred at 110°C for 15h. The reaction mixture
was cooled to room temperature and water (20 mL) was added. A solid
precipitated out and was isolated by filtration. It was washed with water and dried
under vacuum. The crude compound was purified by column chromatography
(Silica Gel 230-400 mesh; 2-5% MeOH in CH2CI2 as eluent) to give 2-[3,5-
dimethyl-4-(2-morpholin-4-yI-ethoxy)phenyl]pyrano[2,3-b]pyridine-4-one (0.11 g ,
50%) as a pale yellow solid. To a solution of above compound (0.098 g, 0.26
mmol) in anhydrous CH2CI2 (5 mL) was added hydrogen chloride (1 mL, 1.0 M
solution in ether) dropwise. The reaction mixture was stirred at room temperature
for 2 hours. The solvent was removed and the solid was triturated with 10%
methanol in ether to give 2-(3,5-dimethyl-4-(2-morpholinoethoxy)phenyl)-4H-
pyrano[2,3-b]pyridin-4-one (0.09 g , 77%) as the hydrochloride; MS (ES) m/z:
381.03 (M+1); MP 276-278°C.
-82-


Example 32: 2-(3-Bromo-4-hydroxyphenyl)-4H-pyrano[2,3-b]pyridin-4-one
[0195] Sodium methoxide (18 ml_, 25 wt% in methanol) was added slowly
to a solution of ethyl-2-chloronicotinate (11.14 g 60 mmol) in anhydrous methanol
(60 ml_). The reaction mixture was stirred under reflux for 15 h, then cooled to
room temperature. The methanol was removed in vacuo. The residue was
dissolved in EtOAc (200 mL) and sat. ammonium chloride solution (50 ml_) was
added. The organic layer was separated and dried over anhydrous Na2S04.
Removal of solvent gave ethyl-2-methoxynicotinate (8.58 g, 79%) as yellow oil.
Sodium hydride (0.21 g, 60% in mineral oil, 5.16 mmol) was mixed with anhydrous
DMF (5 mL). A solution of 3'-bromo-4'-methoxyacetophenone (0.99 g, 4.3 mmol)
in anhydrous DMF (3 mL) was added drop-wise at 0°C under nitrogen. The
mixture was stirred at 0°C for 5 min. and then at room temperature for 30 min. The
mixture was cooled to 0°C. A solution of ethyl 2-methoxy nicotinate (1.81 g, 10
mmol) in anhydrous DMF (3 mL) was added slowly. The ice bath was removed
and the stirring continued at room temperature under nitrogen for 20 hours. Water
(20 mL) was added and the mixture was extracted with EtOAc (2x100 mL). The
organic layer was washed with brine and dried over anhydrous Na2S04- Removal
of the solvent gave a dark solid. Triturating with ether gave a yellow solid (1.32 g,
84%). The solid (1.31g, 3.6 mmol) and pyridinium hydrochloride (6.24g, 54 mmol)
were mixed together and stirred at 190°C for 3 h, The reaction mixture was then
cooled to room temperature, followed by the addition of water (200 mL). The solid
was isolated by filtration, washed with water and dried under vacuum. The crude
compound was purified by column chromatography (Silica Gel 230-400 mesh;
5:4:1 hexanes, EtOAc and methanol as an eluent) to give 2-(3-bromo-4-
hydroxyphenyl)-4H-pyrano[2,3-/)]pyridin-4-one (0.453 g, 40%) of as yellow solid.
MS (ES) m/z: 317.84, 239.9; Mp. 267-272°C.
-83-


Example 33: 2-(4-hydroxy-3,5-dimethylphenyl)-6-(pyrrolidin-1-ylmethyl)-4H-
pyrano[2,3-b]pyridin-4-onedihydrochloride
[0196] A solution of oxalyl chloride (32.8 g, 0.258 mol) in 1,2-
dichloroethane (50 ml_) was added dropwise to a stirred, cooled (0°C) solution of
dimethylformamide (43.2 g, 0.591 mol) in 1,2-dichloroethane (70 ml_) so that the
temperature of the reaction mixture did not exceed 10°C. The resulting mixture
was stirred at 0-5°C for a furtherl .75 hours then allowed to reach room
temperature. 2-Methylmalonic acid (14.0 g, 0.118 mol) was added to the stirred
mixture. The mixture was stirred at reflux temperature for 6 hours then at room
temperature overnight. The solvent was evaporated (keeping bath temperature at
25°C or less) and replaced with dry methanol. Methylcyanoacetate (12.9 g, 0.130
mol) was added and the mixture was stirred. Sodium methoxide (86.6 ml_, 25% in
methanol) was added ensuring that the reaction mixture temperature did not
exceed 30°C. The cooled mixture was stirred for 30 min. then at room
temperature for 3.5 hours. T solvent was removed by evaporation and replaced
with dichloroethane. The mixture was washed with water, dried and evaporated.
The crude product was triturated with cold methanol (30 ml_) to yield the desired
methyl 5-(N, A/-dimethylamino)-2-cyano-4-methylpent-2,4-dienoate (17.0 g,
66.0%) as a yellow solid. MP 163-164°C. Hydrogen chloride gas was bubbled
through a suspension of methyl 5-(N, A/-dimethylamino)-2-cyano-4-methylpent-
2,4-dienoate (17.0 g, 0.078 mol) in 1,2-dichloroethane for 6- hours. Further
saturation of the suspension with HCI gas was followed by stirring at room
temperature overnight. Excess HCI was blown out of the reaction mixture with
nitrogen gas. The mixture was washed with water, dried and evaporated. The
resulting oil crystallized on standing to yield an orange solid (14.4 g, 99%). The
orange solid (14.0 g, 0.0754 mol) in anhydrous methanol (40 ml_) was added to a
250 mL dry flask with reflux condenser. Sodium methoxide (31 ml_, 0.14 mol, 25%
-84-

in methanol) was added to the solution and the reaction was carried out at reflux
overnight. Acetic acid was added to the mixture until pH 7.0 and the methanol was
removed. The residue was poured into water and extracted with dichloromethane.
The organic layer was further washed with water, brine and dried over sodium
sulfate. Dichloromethane was removed to yield the desired intermediate (13.5 g,
98.0%). The intermediate (8.65g, 0.048 mol) was dissolved in dry carbon
tetrachloride (80 mL) and NBS (8.95 g, 0.050 mol) was added. The reaction
mixture was heated to reflux under a lamp for 3 hour. After cooling, the solvent
was removed and the residue was further washed with hot water to get ride of the
succinimide. The solid was purified by column (DCM: ethyl acetate 30:1) to yield
the desired intermediate (7.77 g, 62.2%). The intermediate (0.85 g, 0.00327 mol),
pyrrolidine (0.93-g, 0.0131 mol) and anhydrous THF (10 mL) was heated to reflux
for 2 hours. The solvent was evaporated. The residue was purified by column
(ethyl acetate to ethyl acetate : MeOH 9:1) to give the desired advanced
intermediate (0.60 g, 73.4%). 3,5-Dimethyl-4-hydroxyacetophenone (5.3 g, 0.032
mol) and dry DMF (12 mL) was charged in a 100 mL flask. Sodium hydride (1.28
g, 0.032 mol, 60% in mineral oil) was added followed by benzyl bromide (4.0 mL,
0.032 mol) and the reaction mixture was kept stirring for overnight. The reaction
mixture was poured into water (150 mL) and dichloromethane (150 mL) was
added. The organic phase was separated and further washed with water (3x120
mL), brine and dried over sodium sulfate. The DCM was removed and the desired
compound was solidified and further washed with hexane to yield the desired
building block (7.30 g, 89.7%). The advanced intermediate from above (0.60 g,
0.0024 mol) and the building block described above (0.61 g, 0.0024 mol) were
added to a 50 mL flask with anhydrous DMF (5 mL). Sodium hydride (0.2 g, 60%
in mineral oil) was added and the reaction mixture was kept overnight at room
temperature. The mixture was poured into water (80 mL) and extracted with DCM
(3 x 80 mL) after pH was adjusted to 7.0. The organic phase was further washed
with water, brine and dried over sodium sulfate. Evaporation of the solvent left 1.0
g (88.2%) of the crude product. The crude product (1.0 g, 0.0021 mol) and
pyridine hydrogen chloride (2.0 g, 0.0169 mol) were mixed in a 50 mL flask and
heat to 190°C for 4 h. The mixture was cooled and poured into methanol (8 mL),
then filtered. The collected solid was further washed with ethyl acetate and dry to
-85-

get the hydrochloride 2-(4-hydroxy-3,5-dimethylphenyl)-6-(pyrrolidin-1-ylmethyl)-
4H-pyrano[2,3-b]pyridin-4-one dihydrochloride (0.50 g, 58.7%); MS (ES) m/z:
351.03(M);MP337-338°C.
Example 34: 5,7-dimethoxy-2-(pyridin-4-yl)-4H-chromen-4-one hydrochloride

[0197] To a mixture of 2-hydroxy-4,6-dimethoxy acetophenone (2.00 g,
10.2 mmol), isonicotinic acid (1.25 g, 10.2 mmol) in pyridine (30 ml_) was added
POCI3 (1.72 g, 11.2 mmol) slowly at 0 °C. The reaction was stirred at room
temperature for 16 hours. Water (50 ml_) was added, and the solid was separated
by filtration and dried to give isonicotinic acid-2-acetyl-3,5-dimethoxyphenyl ester
(2.72 g, 86%).
[0198] To a solution of isonicotinic acid-2-acetyl-3,5-dimethoxyphenyl
ester (2.72 g, 9.03 mmol) in anhydrous THF (50 mL) was added potassium tert-
butoxide (1.21 g, 10.8 mmol) in small portions. The reaction mixture was stirred at
room temperature for 24 hours. A sat. NH4CI solution (20 mL) was added. The
organic layer was separated and aqueous phase was extracted with ethyl acetate
(100 mL). The combined organic phase were washed with water, brine and dried
over anhydrous Na2S04. Removal of solvent gave 1-(2-hydroxy-4,6-
dimethoxyphenyl)-3-pyridin-4-yl-propane-1,3-dione (2.4 g, 88%). To a mixture of
1-(2-hydroxy-4,6-dimethoxyphenyl)-3-pyridin-4-yl-propane-1,3-dione (2.4 g, 7.96
mmol) acetic acid (10 mL) and cone. HCI (1 mL) was heated at 100 °C for 1 hours.
The reaction mixture was cooled to room temperature, diluted with water,
neutralized with a sat. aqueous NaHC03 solution. The solid was filtered off and
dissolved in CH2CI2 (120 mL) and hydrogen chloride in ether (5 mL, 2.0M solution)
was added. The formed solid was isolated by filtration, washed with 10%
methanol in ether and ether to give 5,7-dimethoxy-2-(pyridin-4-yl)-4H-chromen-4-
-86-

one hydrochloride (0.335 g, 13%) as a yellow solid; MS (ES) m/z: 283.94 (M); MP
234-235°C
Example 35: 2-phenyl-6-(pyrro!idin-1 -ylmethyl)-4H-pyrano[2,3-b]pyridin-4-one
hydrochloride

[019.9L..A solution of oxalyl chloride (32.8 g, 0.258 mol) in 1,2-
dichloroethane (50 ml_) was added dropwise to a stirred, cooled (0°C) solution of
dimethylformamide (43.2 g, 0.59 mol) in 1,2-dichloroethane (70 ml_) so that the
temperature of the reaction mixture did not exceed 10°C. The resulting mixture
was stirred at 0-5°C for 1.75 hours then allowed to reach room temperature. 2-
Methylmalonic acid (14.0 g, 0.12 mol) was added to the stirred mixture. When gas
evolution ceased, the mixture was stirred at reflux temperature for 6 hours then at
room temperature overnight. The solvent was evaporated (keeping bath
temperature at 25°C or less) and replaced with dry methanol. Methylcyanoacetate
(12.86 g, 0.130 mol) was added and the mixture was stirred. Sodium methoxide
(86.6 mL 25% in methanol) was added ensuring that the reaction mixture
temperature did not exceed 30°C. The cooled mixture was stirred for 30 min. then
at room temperature for 3.5 hours. The solvent was removed by evaporation and
replaced with dichloroethane. The mixture was then washed with water, dried and
concentrated. The crude product was triturated with cold methanol (30 mL) to
yield methyl 5-(N, A/-dimethylamino)-2-cyano-4-methylpent-2,4-dienoate as a
yellow solid (17.0 g 66%). M. p. 163-164°C. Hydrogen chloride gas was bubbled
through a suspension of methyl 5-(N, A/-dimethylamino)-2-cyano-4-methylpent-
2,4-dienoate (17.0 g, 0.078 mol) in 1,2-dichloroethane for 6 hours. Further
saturation of the suspension with HCI gas was followed by stirring at room
temperature overnight. Excess HCI was blown out of the reaction mixture with
nitrogen gas. The mixture was washed with water, dried and concentrated. The
-87-

resulting oil crystallized on standing to yield an orange solid (14.4 g, 99%). The
orange solid (14.0 g, 0.075 mol) was dissolved in anhydrous methanol (40 mL) in
a 250 mL dry flask with reflux condenser. Sodium methoxide (31 mL, 0.143 mol,
25% in methanol) was added to the solution and the reaction was carried out at
reflux overnight. Acetic acid was added to the mixture to pH 7.0 and methanol was
removed. The residue was poured into water and extracted with dichloromethane.
The organic layer was further washed with water, brine and dried over sodium
sulfate. Dichloromethane was removed to yield the desired intermediate (13.5 g,
98.0%). The intermediate (8.65g, 0.048 mol) was dissolved in dry carbon
tetrachloride (80 mL) followed by addition of NBS (8.95 g, 0.050 mol). The
reaction mixture was heated to reflux under a lamp for 3 hour. After cooling the
solvent was removed and the residue was further washed with hot water to get
ride of succinimide. The solid was then purified by column (DCM: ethyl acetate
30:1) to yield the desired intermediate (7.77 g, 62.2%). A mixture of the
intermediate (4.4 g, 0.017 mol), pyrrolidine (4.81 g, 0.068 mol) and anhydrous
THF (20 mL) was heated to reflux for 2 hours. The solvent was evaporated. The
residue was purified by column (ethyl acetate to ethyl acetate : MeOH 9:1) to give
the desired intermediate (3.50 g, 82.8%). The intermediate (0.50 g, 0.002 mol)
and acetophenone (0.24 g, 0.002 mol) were added to a 50 mL flask with
anhydrous DMF (4 mL). Sodium hydride (0.16 g, 60% in mineral oil) was added
and the reaction mixture was kept overnight at room temperature. The mixture
was poured into water (80 mL) and extracted with DCM (3 * 80 mL) after pH was
adjusted to 7.0. The organic layer was further washed with water and brine. The
organic layer was dried over sodium sulfate and concentrated to yield the desired
intermediate (0.45 g, 66.5%). A 50 mL flask was charged with the intermediate
(0.45 g, 0.00133 mol) and pyridine hydrogen chloride (1.54 g, 0.0133 mol) and
heat to 190°C for 1 h. The mixture was cooled and poured into methanol (4 mL)
then filtered, the collected solid was further washed with ethyl acetate and dried to
give 2-phenyl-6-(pyrrolidin-1-ylmethyl)-4H-pyrano[2,3-b]pyridin-4-one (0.190 g,
41.7%) as the hydrochloride salt. MS (ES) m/z: 306 (M); MP 294-296°C
-88-

Example 36: 6-(4-oxo-4H-chromen-2-yl)benzo[d]oxazol-2(3H)-one

[0200] Step 1: To a round bottomed flask was added methyl 4-amino-3-
hydroxybenzoate (4.0 g, 23.9 mmol) under nitrogen. Dry dichloromethane (100
mL) was added with stirring. Triethyl amine (7.3 ml_, 52.6 mmol) was added,
followed-by slow addition of triphosgene (2.84 g, 9.56 mmol). The reaction mixture
was stirred at room temperature overnight. The solvent was evaporated and the
reaction mixture was diluted with ethyl acetate. The organic layer was washed
successively with water, diluted sodium bicarbonate, water, 1N HCI, water, brine
and dried over sodium sulfate. The solvent was evaporated in vacuo to leave a
residue, which was recrystallized from ethyl acetate and hexane afforded 3.4 g
(81%) of desired intermediate.
[0201] Step 2: The product (1.64 g, 8.47 mmol) from step 1 was dissolved
in a mixture of methanol (5 mL) and tetrahydrofuran 5 mL. Potassium hydroxide
(1.25 g, 22.28 mmol) in water (6 mL) was added. The reaction mixture was
refluxed at 70°C for 3 days and 80°C for 2 days. The solvent was evaporated in
vacuo. Water was added and the reaction mixture was acidified with 1N HCI (pH
4-5) and extracted with ethyl acetate. The solvent was evaporated in vacuo to
leave 1.43 g (94%) of pure compound. The compound was used for the following
reaction without further purification.
[0202] Step 3: The product from step 2 (0.108 g, 0.6 mmol) and 2-
hydroxyacetophenone (0.09 g, 0.66 mmol) were added to a round bottomed flask
under nitrogen. Anhydrous pyridine (5 mL was added to it with stirring. The
reaction mixture was cooled down using an ice bath. Phosphorus oxychloride
(0.15 g, 0.99 mmol) was added and the reaction mixture was stirred at room
temperature overnight. Pyridine was removed under vacuum and the residue was
acidified with 1N HCI (pH 4-5) and extracted with ethyl acetate. The solvent was
-89-

evaporated in vacuo to leave a residue which was purified by silica gel column
chromatography (15 g). The eluent was a mixture of ethyl acetate and hexane in
1:1. Fraction 1 was evaporated affording pure compound (0.0192 g, 11%).
[0203] Step 4: The product from step 3 (0.25 g, 0.84 mmol) was taken in a
three-necked round bottomed flask under nitrogen. Anhydrous tetrahydrofuran (15
mL) was added, followed by potassium ferf-butoxide (0.142 g, 1.26 mmol). The
reaction mixture was stirred at room temperature for 24 hours. Water (20 mL) was
added and the reaction mixture was quenched with 1N HCI and extracted with
ethyl acetate. The solvent was evaporated in vacuo to leave a residue, which was
purified by silica gel column chromatography (25 g) using gradient elution
technique (20%-50% ethyl acetate in hexane), giving the desired compound
(0.183 g, 73%).
[0204] Step 5: The compound from step 4 (0.18 g, 0.61 mmol) was
dissolved in acetic acid (30 mL), followed by addition of cone. HCI (2 mL). The
reaction mixture was refluxed for 2 hours (bath temp. 130°C). Acetic acid was
evaporated in vacuo and water was added. The solid was filtered off and dried
under vacuum to give 6-(4-oxo-4H-chromen-2-yl)benzo[d]oxazol-2(3H)-one (0.119
g, 70%); MS (ES) m/z: 279.84 (M); MP 347.6-348.2°C
Example 37: 2-(4-fluorophenyl)-6-(pyrrolidin-1 -ylmethyl)-4H-pyrano[2,3-b]pyridin-
4-one hydrochloride

[0205] To a stirred solution of 2-methoxy-5-pyrrolidin-1-ylmethyl nicotinic
acid methyl ester (0.5 g, 2.0 mmol) and 1-(4-fluorophenyl) ethanone (0.276 g, 2.0
mmol) in anhydrous DMF (3 mL), sodium hydride (0.160 g, 2.0 mmol, 60%
suspension in mineral oil) was added in small portions under nitrogen. The
reaction mixture was stirred overnight at room temperature. A saturated aqueous
NH4CI solution (30 mL) was added. The mixture was extracted with ethyl acetate
-90-

(100 ml_). The organic layer was washed with water (30 ml_) and brine (30 mL),
and dried over anhydrous Na2S04. Removal of solvent gave a brown solid (0.45
g) which was used in next step without further purification. The above compound
(0.45 g, 1.26 mmol) and pyridine hydrochloride (1.6 g, 12.6 mmol) were mixed
together and stirred at 190°C for 4 hours. Cooled to room temperature. Water (10
mL) was added, neutralized to pH ~9 with sat. aqueous NaHCC solid was separated by filtration. The solid was dissolved in 1:1 CH2CI2 -
methanol (5 mL). Hydrogen chloride in ether (1 mL, 1.0M solution) was added and
the reaction mixture was stirred at room temperature for 1 hours. The solvent was
removed under reduced pressure. The residue was triturated with 10% methanol
in ether to give 2-(4-fiuorophenyl)-6-(pyrrolidin-1-ylmethyl)-4H-pyrano[2,3-
b]pyridin-4-one hydrochloride (205 mg, 51%) as yellow solid. -MS (ES) m/z:
324.89 (M); MP 265-268°C
Example 38: 2-(4-aminophenyl)-4H-pyrano[2,3-b]pyridin-4-one hydrochloride

[0206] To a solution of 2-(4-amino phenyl) pyrano[2,3-b]pyridine-4-one
(0.115 g, 0.483 mmol) in dichloromethane (10 mL) and methanol (1 mL) was
added of hydrogen chloride in ether (1.0 mL, 1.0M solution) dropwise. A orange
precipitate was formed. Stirred under nitrogen for 1 hours. The solvent was
removed and the solid was triturated with 10% methanol in ether to give 2-(4-
aminophenyl)-4H-pyrano[2,3-b]pyridin-4-one (0.13 g, 98%) as the orange
hydrochloride; MS (ES) m/z: 238 (M); MP 254-255°C
-91 -

Example 39: 2-(4-isopropoxyphenyl)-6-(pyrroHdin-1-ylmethyl)-4H-pyrano[2,3-
b]pyridin-4-one hydrochloride

[0207] Sodium hydride (1.32 g, 33 mmol, 60% suspension in mineral oil)
was suspended in anhydrous DMF (20 ml_). A solution of 4-hydroxy
acetophenone (4.08 g, 30 mmol) in anhydrous DMF (20 ml_) was added dropwise
at room temperature. The reaction mixture was stirred at room temperature for 30
min. A solution of 2-bromopropane (4.61 g, 37.5 mmol) in anhydrous DMF (10
ml_) was added slowly. The reaction mixture was stirred at room temperature
overnight. Water (100 mL) was added. The mixture was extracted with ethyl
acetate (2> brine (50 mL). Dried over anhydrous Na2SO4. Removal of solvent gave 1-(4-
isopropoxy phenyl) ethanone as a pale yellow solid (3.52 g, 66%). To a stirred
solution of 2-methoxy-5-pyrrolidin-1-ylmethyI nicotinic acid methyl ester (0.5 g, 2.0
mmol) and 1-(4-isopropoxy phenyl) ethanone in anhydrous DMF (10 mL), sodium
hydride (96 mg, 2.4 mmol, 60% suspension in mineral oil) was added in small
portions under nitrogen. The reaction mixture was stirred overnight at room
temperature. Reaction mixture was stirred at 80°C for 1 hours. Water (30 mL) was
added. The mixture was extracted with chloroform (150 mL). The organic layer
was washed with water (30 mL) and brine (30 mL). Dried over anhydrous Na2SO4.
Removal of solvent gave brown solid (0.66 g) which was used in next step without
further purification. The above solid (0.626 g, 1.58 mmol) and pyridine
hydrochloride (1.18 g, 15.8 mmol) were mixed together and stirred at 190°C for 20
min. Cooled to room temperature. Water (10 mL) was added, neutralized to pH
~9. The mixture was extracted with chloroform (2x100 mL). The organic layer was
washed with brine (50 mL) and dried (Na2S04). Removal of the solvent gave 2-(4-
isopropoxy phenyl)-6-pyrrolidin-1-ylmethyl pyrano[2,3-b]pyridine-4-one (0.237 g,
41%) as yellow solid. To a soiution of the above compound in anhydrous CH2CI2
-92-

(10 mL) was added 1.0 M solution of hydrogen chloride in ether dropwise. The
reaction mixture was stirred for 10 min. The solvent was removed under reduced
pressure. The residue was washed with hexane and ether. Purified by triturating
with 10% methanol in ether to give 2-(4-isopropoxyphenyl)-6-(pyrrolidin-1-
ylmethyl)-4H-pyrano[2,3-b]pyridin-4-one hydrochloride (0.20 g, 83%) as yellow
solid. MS (ES) m/z: 264 (M); MP 261-263°C
Example 40: 7-(4-hydroxy-3,5-dimethylphenyl)-1,6-naphthyridin-5(6H)-one
hydrochloride

[0208] Oxalyl chloride (1.90 mL, 21.8 mmol) was added to 2-methyl
nicotinic acid (1.50 g, 10.9 mmol) in anhydrous dichloromethane (20 mL) with
triethylamine (1.6 mL, 11.5 mmol) and the reaction mixture was kept at room
temperature overnight and the solvent was removed. THF was added to the
residue and ammonia gas was bubbled into for 2 hours. THF was removed and
the residue was dissolved into methanol and water and adjusted pH to 10.0 by
potassium carbonate and concentrated. After column chromatography the desired
amide was isolated (1.10 g, 73.8%). NaH (0.428 g, 10.7 mmol, 60% in mineral oil)
was added to 4-hydroxy-3,5-dimethylbenzonitrile (1.50 g, 10 mmol) in anhydrous
DMF (8 mL) and then benzyl bromide (1.83 g, 10.7 mmol) was added and the
reaction was kept at room temperature overnight. The reaction mixture was
poured into water and filter the solid was further washed with hexane to yield the
desired ether (2.0 g, 84.3%). It was used for next step reaction without further
purification. The above amide (0.65 g, 4.77 mmol) in anhydrous THF (15 mL) was
added dropwise to BuLi (7.5 mL, 1.60 M) at -20°C. The reaction mixture was kept
at this temperature for one hour and then the above described ether (1.13 g, 4.77
mmol) in THF (20 mL) was added drop-wise at -20°C and the reaction was further
kept for 1.5 hours. The reaction temperature was increased to room temperature
-93-

and kept for another hour. Water (20 mL) was added and the mixture was stirred
for a while and the solvent was removed and the residue was purified by column
to yield the desired intermediate (0.50 g, 29.4%). In a 50 mL flask was charged
with the above described intermediate (0.50 g, 0.0014 mol) and pyridine hydrogen
chloride (2.4 g, 0.014 mol) and the mixture was heated to 180°C for 1.5 hour. The
mixture was cooled and poured into methanol (4 mL) then filtered. The collected
solid was further washed with ethyl acetate and dried to give 7-(4-hydroxy-3,5-
dimethylphenyl)-1,6-naphthyridin-5(6H)-one (350 mg, 82.7%) as the hydrochloride
salt; MS (ES) m/z: 266 (M); MP >350°C
Example 41: 2-hydroxy-7-(4-hydroxy-3,5-dimethylphenyl)-4-methoxy-1,6-
naphthyridin-5(6H)-one dihydrochioride

[0209] A mixture of malonic acid (20 g, 192 mmol), 2,4,6-trichlorophenol
(72 g, 365 mmol), and phosphorus oxychloride (38 mL, 403.2 mmol) was stirred at
reflux for 12 hours. The reaction mixture was cooled to 70°C and poured into ice
water. The solid was collected by filtration, washed with water, and air dried to
give malonic acid bis-(2,4,6-trichloro-phenyl) ester (85 g, 95%). A solution of
malonic acid bis-(2,4,6-trich!oro-phenyl) ester (85 g, 183.6 mmol) and ethyl 3-
aminocrotonate (26.1 g, 202 mmol) in bromobenzene (100 mL) was stirred at
reflux for 50 min. The reaction mixture was cooled to 50°C and diluted with EtOAc
(260 mL). The solid was collected by filtration, washed with water, and air dried to
give 4,6-dihydroxy-2-methyl nicotinic acid ethyl ester (31 g, 86%).
[0210] A solution of 4,6-dihydroxy-2-methyl nicotinic acid ethyl ester (31 g,
157 mmol) in phosphorus oxychloride (60 mL, 629 mmol) was stirred at reflux for
1.5 hours. The extra phosphorus oxychloride was removed using a rotary
evaporator and the reaction mixture was purred into icy water. The solid was
-94-

removed by filtration. The filtrate was extracted with dichloromethane (3x100 mL),
and concentrated using a rotary evaporator. The residue was further purified by
column (Si02, Hexanes/EtOAc = 5:1) to yield 4,6-dichloro-2-methyl nicotinic acid
ethyl ester (16.9 g, 46%). A solution of 4,6-dichloro-2-methyl nicotinic acid ethyl
ester (16.9 g, 71.3 mmol) in MeOH (60 mL) was mixed with sodium methoxide (58
mL, 257 mmol) and stirred at reflux for 12 hours. The reaction was quenched by
adding AcOH (50 mL), diluted with water (200 mL), extracted with
dichloromethane (3x100 mL), and concentrated using a rotary evaporator. The
residue was further purified by column (Si02, Hexanes/EtOAc = 6:1) to yield 4,6-
dimethoxy-2-methyl nicotinic acid methyl ester (10 g, 67%). A solution of 4,6-
dimethoxy-2-methyl nicotinic acid methyl ester (2.6 g, 12.3 mmol) and lithium
hydroxide (1.06 g, 44.1 mmol) in water (40 mL), MeOH (30 mL) and THF (20 mL)
was stirred at reflux for 4 hours. The reaction mixture was concentrated using a
rotary evaporator to dryness. The residue was mixed with HCI (cone.) (20 mL) and
was concentrated again on high vacuum to dryness to yield crude 4,6-dimethoxy-
2-methyl nicotinic acid (quantitative). To a solution of 4,6-dimethoxy-2-methyl
nicotinic acid (2.5 g, 12.0 mmol) in dichloromethane (50 mL) and THF (50 mL) at
room temperature was added oxalyl chloride (2.57 mL, 29.4 mmol) and DMF (3
drops). The reaction mixture was stirred at room temperature for 30 min,
concentrated to dryness using a rotary evaporator to afford 4,6-dimethoxy-2-
methyl nicotinic acid chloride HCI salt (2.8 g). A solution of 4,6-dimethoxy-2-
methyl nicotinic acid chloride HCI salt (8.5 g, 33.73 mmol) in dichloromethane (20
mL) and THF (20 mL) at room temperature was mixed with methylamine in THF
(50 mL, 98 mmol) and stirred at 20°C for 1 hour. The reaction mixture was diluted
with water (100 mL), extracted with dichloromethane (3x100 mL), and
concentrated using a rotary evaporator to yield 4,6-dimethoxy-2,N-dimethyl-
nicotinamide (4.2 g, 66%) as a light yellow solid. A solution of 4-hydroxy-3,5-
dimethylbenzonitrile (2 g, 13.6 mmol) in DMF (20 mL) at room temperature was
mixed with sodium hydride ( 0.706 g, 17.6 mmol) and stirred for 30 min.. Benzyl
bromide (1.62 mL, 13.59 mmol) was then added and the reaction mixture was
stirred at room temperature for 24 hours. The reaction was quenched by adding
water (200 mL), extracted with EtOAc (3x100 mL), and concentrated using a
rotary evaporator. The residue was further purified by column (SiO2,
-95-

Hexanes/EtOAc = 6:1) to yield 4-benzyloxy-3,5-dimethylbenzonitrile (3.25 g,
100%) as a white solid. To a solution of 4,6-dimethoxy-2,N-dimethyl-nicotinamide
(0.54 g, 2.57 mmol) in THF (50 ml_) at -20°C was added n-BuLi (3.54 mL, 5.67
mmol). The reaction was stirred at -20°C ~ 0°C for 2 hours and then was cooled to
-78°C. At -78°C 4-benzyloxy-3,5-dimethylbenzonitrile (0.49 g, 2.057 mmol) was
added, the cooling bath was removed, and the reaction was allowed to warm up
gradually to room temperature. After stirring at room temperature for 14 hours the
reaction was quenched by adding water (100 mL), extracted with dichloromethane
(x3> further purified by column (SiO2, Hexanes/EtOAc = 1:5) to yield 7-(4-benzyloxy-
3,5-dimethyl-phenyl)-2,4-dimethoxy-6H-[1,6]naphthyridin-5-one (0.32 g, 37%). A
solution of 7-(4-benzyloxy-3,5-dimethy]-phenyl)-2,4-dimethoxy-6H-
[1,6]naphthyridin-5-one (0.25 g, 0.6 mmol) in dichloromethane (100 mL) was
mixed with BBr3 (3 mL, 3 mmol) and stirred at room temperature for 16 hours. The
reaction was quenched by adding water (20 mL). The resulting solid was collected
by filtration, washed with water and DCM to yield a light yellow solid. This solid
was mixed with HCI in ether (10 mL, 10 mmol), stirred for 1 hour, filtered to afford
2-hydroxy-7-(4-hydroxy-3,5-dimethylphenyl)-4-methoxy-1,6-naphthyridin-5(6H)-
one (70 mg, 37%) as a light yellow dihydrochloride. MS (ES) m/z: 312 (M); MP
>330°C
Example 42: 3-(4-(2-hydroxy-2-methylpropoxy)-3,5-dimethyIphenyl)-6,8-
dimethoxyisoquinolin-1 (2H)-one

[0211 ] To a solution of 4-hydroxy-3,5-dimethylbenzonitrile (2.00 g, 13.5
mmol) and 1-chloro-2-methyl propan-2-ol (8.85 g, 81.5 mmol) in ethanol (50 mL)
was added potassium carbonate (7.5 g, 54 mmol) and water (5 mL). The reaction
-96-

mixture was stirred at reflux for 24 hours. Cooled to room temperature. The
precipitated solid was filtered off and washed with water. The solid was dissolved
in ethyl acetate (100 mL), washed with water (50 ml_), brine (50 ml_) and dried
over anhydrous Na2S04. Removal of solvent gave 4-(2-hydroxy-2-
methylpropoxy)-3,5-dimethyl benzonitrile (2.9 g, 97%) as a white solid. To a
solution of 4-(2-hydroxy-2-methylpropoxy)-3,5-dimethyl benzonitrile (2.90 g, 13.2
mmol) in anhydrous DMF (20 mL) was added imidazole (2.7 g, 40 mmol) and tert-
butyldimethylsilylchloride (2.19 g, 14.6 mmol). The reaction mixture was stirred at
room temperature under nitrogen for 3 days. Water (200 mL) was added and the
mixture was extracted with ethyl acetate (200 mL). The organic layer was washed
with water (2x100 mL) and brine (100 mL), and dried over anhydrous Na2SO4.
The solventwas removed under reduced pressure and the crude compound was
purified by column chromatography (Silica Gel 230-400 mesh; 10% ethyl acetate
in hexanes as eluent) to give 4-[2-(ferf-butyldimethylsilanyloxy)-2-methylpropoxy]-
3,5-dimethylbenzonitrile (2.24 g, 54%). n-Butyl lithium (6.2 mL, 6.6 mmol, 1.6 M
solution in hexanes) was added to a solution of 2,4-dimethoxy-6-A/-
dimethylbenzamide (0.9 g, 4.3 mmol) in anhydrous THF (10 mL) dropwise at -
10°C over a period of 10 min under nitrogen. The stirring was continued at 0°C
for 1 hour. The reaction mixture was cooled to -50°C. A solution of 4-[2-(tert-
butyldimethylsilanyloxy)-2-methylpropoxy]-3,5-dimethylbenzonitrile (1.58 g, 4.73
mmol) in anhydrous THF (5 mL) was quickly added. The cooling bath was
removed and the reaction mixture was allowed to warm to room temperature. The
stirring was continued at room temperature for 1 hour. Aqueous ammonium
chloride solution (10 mL) was added. Ethyl acetate (100 mL) was added. The
organic layer was separated, washed with water (10 mL) and dried (Na2S04). The
solvent was removed under reduced pressure and the crude compound was
purified by column chromatography (Silica Gel 230-400 mesh; 0-5% methanol in
CH2CI2 as eluent) to give 3-{4-[2-(terf-butyIdimethylsilanyloxy)-2-methylpropoxy]-
3,5-dimethylphenyl}-6,8-dimethoxy-2H-isoquinolin-1-one (0.82 g, 37%) of as white
solid. The above compound (0.42 g, 0.82 mmol) was dissolved in anhydrous THF
(20 mL). Tetrabutyl ammonium fluoride (4.1 mL, 1.0M solution in THF) was added
at 0°C. The reaction mixture was stirred at 0°C for 10 min, then at room
temperature for 2 h and then stirred at 70°C for 24 hours. The mixture was cooled
-97-

to room temperature. Saturated aqueous ammonium chloride (30 mL) was added.
The organic phase was separated, washed with water, brine and dried over
anhydrous Na2S04. The solvent was removed under reduced pressure. The
crude product was purified by column chromatography (Silica Gel 230-400 mesh;
0-4% methanol in CH2CI2 as eluent) to give 3-(4-(2-hydroxy-2-methylpropoxy)-3,5-
dimethylphenyl)-6,8-dimethoxyisoquinolin-1(2H)-one (0.15 g, 46%) as a white
solid. MS (ES) m/z: 398.96 (M+1); MP 252-254°C
Example 43: 2,6-dimethyl-4-(1-(methylamino)-7-((4-methylpiperazin-1-
yl)methyl)isoquinolin-3-yl)phenoltrihydrochloride

[0212] To a solution of 5-bromomethyl-2,A/-dimethylbenzamide (4.94 g, 24
mmol) in anhydrous THF (75 mL) was added A/-methyipiperazine (5.3 mL, 4.81 g,
48 mmol). A white precipitate was formed. Stirring continued overnight. Water
(100mL) was added, and the mixture was extracted with ethyl acetate (200 mL).
The organic layer was washed with brine and dried over anhydrous Na2S04.
Purification by column chromatography (Silica Gel 230-400 mesh; 0-5% methanol
(containing 7.0 M ammonia) in CH2CI2 as eluent) to give 2,N-dimethyl-5-(4-
methylpiperazin-1-ylmethyl) benzamide (2.4 g, 38%) of as a gummy material, n-
Butyl lithium (9.1 mL, 14.64 mmol, 1.6 M solution in hexanes) was added to a
solution of 2,N-dimethyl-5-(4-methylpiperazin-1-ylmethyl) benzamide (0.87 g, 3.33
mmol) in anhydrous THF (10 mL) dropwise at -10°C over a period of 10 min under
nitrogen. Color changed to orange-red. Stirring continued at 0°C for 1 hour. The
reaction mixture was cooled to -50°C. A solution of 4-(tert-
butyldimethyIsilanyloxy)-3,5-dimethylbenzonitrile (1.09 g, 4.16 mmol) in anhydrous
THF (5 mL) was quickly added. Cooling bath was removed and the reaction
mixture was allowed to warm to room temperature. Stirring was continued at room
-98-

temperature for 1 hour. The reaction mixture became dark colored. An aqueous
ammonium chloride solution (20 mL) was added. The color changed to pale
yellow. Ethyl acetate (50 mL) was added. The organic layer was separated,
washed with water (10ml_) and dried (Na2SO4). Removal of the solvent gave a
yellow gummy material, which was used in next step without further purification.
The above compound (1.87 g) was dissolved in anhydrous THF (10 mL).
Tetrabutyl ammonium fluoride (6.8 mL, 1.0M solution in THF) was added at 0°C.
The reaction mixture was stirred at 0°C for 30 min. and then at room temperature
for 1 hour. Saturated aqueous ammonium chloride (30 mL) was added. The
mixture was extracted with ethyl acetate (100 mL) and the organic layer was
separated and dried over anhydrous NaaSO. The solvent was removed under
reduced pressure, the crude product was purified by column chromatography
(Silica Gel 230-400 mesh; 0-5% methanol (containing 7.0 M ammonia) in CH2CI2
as eluent) to give 2,6-dimethyl-4-[1-methylamino-7-(4-methylpiperazin-1-ylmethyl)
isoquinolin-3-yl] phenol (0.487 g, 33%) as purple solid. To a solution of above
compound (0.17 g, 0.43 mmol) in CH2CI2 (10 mL) was added hydrogen chloride in
ether (2.0 mL, 1.0 M solution) dropwise under nitrogen. A yellow precipitate was
formed. The reaction mixture was stirred at room temperature for 1 hour. Solvent
was removed under reduced pressure and dried under vacuum to give 2,6-
dimethyl-4-(1-(methylamino)-7-((4-methylpiperazin-1-yl)methyl)isoquinolin-3-
yl)phenol (0.178 g, 97%) as the trihydrochloride; MS (ES) m/z: 391.10 (M+1); MP
264-266°C
Example 44: 2-(quinoxalin-6-yl)-4H-pyrano[2,3-b]pyridin-4-one

[0213] A mixture of quinoxaline-6-carboxylic acid (2 g, 11.49 mmol) and
thionyl chloride (30 mL) was stirred at reflux for 2 hours. The reaction mixture was
concentrated to dryness using a rotary evaporator to afford quinoxaline-6-
- 99 -

carboxylic acid chloride (crude quantitative). A solution of the above acid chloride
(11.49 mmol) in DCM (50 mL) and pyridine (20 ml_) was mixed with N,0-dimethyl
hydroxylamine HCI salt (2.24 g, 23 mmol) and stirred at room temperature for 12
hours. The reaction was quenched by adding aqueous HCI (50 mL, 1 N),
extracted with DCM (3*100 mL), concentrated using a rotary evaporator. The
residue was further purified by column (Si02, Hexanes/EtOAc = 1:3) to yield
quinoxaline-6-carboxylic acid methoxy-methyl-amide (2 g, 80%). To a solution of
the above Weinreb amide (2.0 g, 9.2 mmol) in THF (30 mL) at 0°C was added
methyl magnesium bromide (3.9 mL, 11.6 mmol). The reaction mixture was stirred
at 0°C for 2 hours and then 1 hour at room temperature, quenched by adding
aqueous HCI (20 mL, 1N), extracted with DCM (3x100 mL), concentrated using a
rotary evaporator. The residue was further-purified by column (Si02,
Hexanes/EtOAc = 1:3) to yield 6-acetylquinoxaline (1.17 g, 74%). A solution of 2-
chloronicotinic acid ethyl ester (5.0 g, 27 mmol) in MeOH (25 mL) was mixed with
sodium methoxide (25.6 mL, 112.5 mmol) and stirred at reflux for 12 hours. The
reaction was quenched by adding water (100 mL), extracted with DCM (3x100
mL), concentrated using a rotary evaporator to afford 2-methoxynicotinic acid
methyl ester (3.2 g, 71%). A solution of 6-acetylquinoxaline (0.62 g, 3.6 mmol), 2-
methoxynicotinic acid methyl ester (0.64 g, 3.8 mmol), and sodium hydride (0.46
g, 11.4 mmol) in THF (100 mL) was stirred at room temperature for 16 hours. The
reaction was quenched by adding water (100 mL) and AcOH (20 mL), extracted
with dichloromethane (3x100 mL), and concentrated using a rotary evaporator.
The residue was re-dissolved in DCM (5 mL) and MeOH (3 mL) and was diluted
with Hexanes (50 mL). The solid was removed by filtration and the filtrate was
concentrated to afford the diketo compound (0.7 g, 60%). A solution of the above
diketone (0.4 g, 1.3 mmol) in AcOH (50 mL) and sulfuric acid (cone, 15 drops)
was stirred at reflux for 1 hour. Most of the solvent was removed using a rotary
evaporator. The residue was re-dissolved in MeOH and neutralized with
potassium carbonate to pH = 8. The solid residue was removed by filtration,
washed with MeOH and DCM. The filtrate was extracted with CH2CI2 (3x100 mL)
and concentrated using a rotary evaporator. The solid residue was purified by
• column (Si02, Hexanes/EtOAc/MeOH = 2:2:1) to afford 2-(quinoxalin-6-yl)-4H-
-100-

pyrano[2,3-b]pyridin-4-one (90 mg, 24%); MS (ES) m/z: 276 (M+1); MP 272.3-
274.8°C
Example 45: 4-(5-amino-2,4-dimethoxy-1,6-naphthyridin-7-yl)-2,6-dimethylphenol

[0214] A mixture of malonic acid (20 g, 192 mmol), 2,4,6-trichlorophenol
(72 g, 365 mmol), and phosphorus oxychloride (38 ml_, 403.2 mmol) was stirred at
reflux for 12 hours. The reaction mixture was cooled to 70°C and poured into icy
water. The solid was collected by filtration, washed with water, and air dried to
give malonic acid bis-(2,4,6-trichloro-phenyl) ester (85 g, 95%). A solution of
malonic acid bis-(2,4,6-trichloro-phenyl) ester (85 g, 184 mmol) and ethyl 3-
aminocrotonate (26.08 g, 202 mmol) in bromobenzene (100 mL) was stirred at
reflux for 50 min. The reaction mixture was cooled to 50°C and diluted with EtOAc
(260 mL). The solid was collected by filtration, washed with water, and air dried to
give 4,6-dihydroxy-2-methyl nicotinic acid ethyl ester (31 g, 86%). A solution of
4,6-dihydroxy-2-methyl nicotinic acid ethyl ester (31.0 g, 157 mmol) in phosphorus
oxychloride (60.0 mL, 629 mmol) was stirred at reflux for 1.5 hours. The extra
phosphorus oxychloride was removed using a rotary evaporator and the reaction
mixture was poured into icy water. The solid was removed by filtration. The filtrate
was extracted with dichloromethane (3x100 mL), and concentrated using a rotary
evaporator. The residue was further purified by column (Si02, Hexanes/EtOAc =
5:1) to yield 4,6-dichloro-2-methyl nicotinic acid ethyl ester (16.9 g, 46%). A
solution of 4,6-dichloro-2-methyl nicotinic acid ethyl ester (16.9 g, 71.3 mmol) in
MeOH (60 mL) was mixed with sodium methoxide (58 mL, 257 mmol) and stirred
at reflux for 12 hours. The reaction was quenched by adding AcOH (50 mL),
diluted with water (200 mL), extracted with dichloromethane (3*100 mL), and
concentrated using a rotary evaporator. The residue was further purified by
-101 -

column (Si02, Hexanes/EtOAc = 6:1) to yield 4,6-dimethoxy-2-methyl nicotinic
acid methyl ester (10g , 67%). A solution of 4,6-dimethoxy-2-methyl nicotinic acid
methyl ester (2.6 g, 12.3 mmol) and lithium hydroxide (1.06 g, 44.1 mmol) in water
(40 ml_), MeOH (30 mL) and THF (20 ml_) was stirred at reflux for 4 hours. The
reaction mixture was concentrated using a rotary evaporator to dryness. The
residue was mixed with cone. HCI (20 mL) and was concentrated again on high
vacuum to dryness to yield crude 4,6-dimethoxy-2-methyl nicotinic acid. To a
solution of 4,6-dimethoxy-2-methyl nicotinic acid (2.5 g, 12.0 mmol) in
dichloromethane (50 mL) and THF (50 mL) at room temperature was added oxalyl
chloride (2.57 mL, 29.4 mmol) and DMF (3 drops). The reaction mixture was
stirred at room temperature for 30 min., concentrated to dryness using a rotary
evaporator to afford crude 4,6-dimethoxy-2-methyl nicotinic acid chloride HCI salt
(2.8 g). A solution of 4,6-dimethoxy-2-methyl nicotinic acid chloride HCI salt (4.8
g, 23.5 mmol) in dichloromethane (100 mL) at room temperature was poured in to
a beaker of ammonium hydroxide (200 mL). The reaction mixture was stirred at
room temperature for 1 hour, extracted with dichloromethane (3*100 mL), and
concentrated using a rotary evaporator to yield 4,6-dimethoxy-2-methyl-
nicotinamide (2.4 g, 52%) as a light yellow solid. A solution of 4-hydroxy-3,5-
dimethylbenzonitrile (2 g, 13.6 mmol) in DMF (20 mL) at room temperature was
mixed with sodium hydride (0.706 g, 17.6 mmol) and stirred for 30 min. Benzyl
bromide (1.62 mL, 13.6 mmol) was then added and the reaction mixture was
stirred at room temperature for 24 hours. The reaction was quenched by adding
water (200 mL), extracted with EtOAc (3*100 mL), and concentrated using a
rotary evaporator. The residue was further purified by column (SiC)2,
Hexanes/EtOAc = 6:1) to yield 4-benzyloxy-3,5-dimethylbenzonitrile (3.25 g,
100%) as a white solid. To a solution of 4,6-dimethoxy-2-methyl-nicotinamide (1
g, 5.1 mmol) in THF (120 mL) at -20°C was added n-BuLi (9.6 mL, 15.3 mmol).
The reaction was stirred at -20°C ~ 0°C for 2.5 hours and then was cooled to
-78°C. At -78°C 4-benzyloxy-3,5-dimethylbenzonitrile (1.21 g, 5.1 mmol) was
added, the cooling bath was removed, and the reaction was allowed to warm up
gradually to room temperature. After stirring at room temperature for 20 hours the
reaction was quenched by adding water (100 mL), extracted with dichloromethane
(3*100 mL), and concentrated using a rotary evaporator. The residue was further
-102-

purified by column (Si02) Hexanes/EtOAc/MeOH = 3:2:1) to yield 7-(4-benzyloxy-
3,5-dimethyl-phenyl)-2,4-dimethoxy-[1,6]naphthyridin-5-ylamine (0.4 g, 19%) and
7-(4-benzyloxy-3,5-dimethyl-phenyl)-2,4-dimethoxy-6H-[1,6]naphthyridin-5-one
(0.34 g, 16%). A solution of 7-(4-benzyloxy-3,5-dimethyl-phenyl)-2,4-dimethoxy-
[1,63naphthyridin-5-ylamine (0.4 g, 0.96 mmol) in DMF (100 ml_) and MeOH (50
ml_) was mixed with palladium/carbon (0.1 g) and subjected to hydrogenation (50
psi) for 2 hours. The mixture was filtered through a celite-pad. The filtrate was
concentrated on high vacuum to afford 4-(5-amino-2,4-dimethoxy-1,6-
naphthyridin-7-yl)-2,6-dimethylphenol (0.31 g, 100%); MS (ES) m/z: 326 (M+1);
MP 163.2-165.5°C
Exampie 46: 2-(4-fluorophenyl)-6-(rnorpholinomethyl)quinazolin-4(3H)-one

[0215] A mixture of 2-amino-5-methylbenzamide (1.0 g, 6.7 mmol), 4-
fluorobenzaldehyde (0.83 g, 6.7 mmol), iodine (2.03 g, 8.0 mmol), and potassium
carbonate (1.38 g, 10 mmol) in DMF (50 mL) was stirred at 80°C for 16 hours. The
reaction mixture was cooled to 20°C and poured into icy water. The solid was
collected by filtration, washed with water, and air dried to give 2-(4-fluoro-phenyl)-
6-methyl-3H-quinazolin-4-one (1.41 g, 83%). A solution of 2-(4-fluoro-phenyl)-6-
methyl-3H-quinazolin-4-one (1.4 g, 5.5 mmol), NBS (0.98 g, 5.6 mmol), and
benzoyl peroxide (67.0 mg, 0.276 mmol) in AcOH (150 mL) and chloroform (150
mL) was stirred at 80°C for 5 hours with light shedding on. The reaction mixture
was cooled to 20°C and concentrated using a rotary evaporator to yield the crude
bromide. A solution of the above crude bromide in DMF (20 mL) and 1,4-dioxane
(100 mL) was mixed with morpholine (10 mL) and stirred at 80°C for 4 hours. The
reaction was quenched by adding water (200 mL), extracted with dichloromethane
(3x100 mL), and concentrated using a rotary evaporator. The residue was further
purified by column (Si02, Hexanes/EtOAc/MeOH = 4:3:1) to yield 2-(4-fluoro-
-103-

phenyl)-6-morpholin-4-ylmethyl-3H-quinazolin-4-one (0.89 g, 48% over two steps).
A solution of 2-(4-fluoro-phenyl)-6-morpho!in-4-ylmethyl-3H-quinazolin-4-one (0.89
g, 2.62 mmol) in dichloromethane (100 mL) and MeOH (50 mL) was mixed with
HCI in ether (8 mL, 16 mmol) and stirred for 1 hour. The reaction was
concentrated using a rotary evaporator. The solid was rinsed with DCM (50 mL)
and MeOH (5 mL), collected by filtration, washed with DCM-MeOH (10:1) to afford
2-(4-fluorophenyl)-6-(morpholinomethyl)quinazolin-4(3H)-one (0.82 g, 76%) as an
off-white solid; MS (ES) m/z: 340 (M+1); MP 321.8-323.3°C
Example 47: 2-(1 H-indazol-5-yl)-6-(morpholinomethyl)-4H-pyrano[2,3-b]pyridin-4-
one

[0216] Methyl 2-methoxy-5-(morpholinomethyl)nicotinate (0.413 g, 1.55
mmol) and 1-(2-(4-methoxybenzyl)-2H-indazol-5-yl)ethanone (0.436 g, 1.55 mmol)
were dissolved in anhydrous DMF (5 mL) under nitrogen. Sodium hydride (0.093
g, 2.3 mmol) was added with stirring at room temperature. The color of the
reaction mixture changed from colorless to brown to orange. The reaction mixture
was stirred at room temperature overnight before pouring into water (100 mL),
adjusted pH ~7 by adding acetic acid. The mixture was stirred for an hour and the
solid (0.1 g) was filtered off, washed with water and hexane. The mother liquor
was extracted with ethyl acetate, evaporated and dried. The two solids were
combined and purified by silica gel (50 g) column chromatography employing 2-
5% methanol in dichloromethane as eluents to give the desired diketo compound
(0.2704 g). The diketo compound (0.270 g, 0.525 mmol) was taken in a round
bottomed flask. Glacial acetic acid (50 mL) was added, followed by cone. HCI (2
mL). The reaction mixture was refluxed for 2 hours (bath temp. 130°C). Acetic
acid was evaporated in vacuo and methanol was added. The solvent was
removed in vacuo, water was added, basified with NaHC03 and extracted with
ethyl acetate. The solvent was evaporated in vacuo to leave a crude product
-104-

(0.218 g, 86%) which was used for the next step without further purification. The
compound from above (0.218 g, 0.45 mmol) was taken into trifluoroacetic acid (10
mL) and the reaction mixture was refluxed (bath temperature 80°C) for 24 hours.
The solvent was evaporated in vacuo and the residue was dissolved in NaOH (20
mL, 0.25 N), acidified with acetic acid. The formed solid was filtered off and
washed with water and hexane. This impure material was further purified by silica
gel (25 g) column chromatography employing 2-5% methanol in hexane/ethyl
acetate as eluents to give the desired intermediate (0.2359 g). The above
compound was dissolved in 5% methanol in dichloromethane. A solution of
hydrogen chloride in diethyl ether was added dropwise. The flask was kept
standing for 0.5 h and the solid was filtered off and dried to give 2-(1 H-indazol-5-
.yl)-6-(morpholinomethyl)-4H-pyrano[2,3-b]pyridin-4-one (0.1217 g, 34%). MS
(ES) m/z: 363 (M+1); MP 293.1-293.2°C
Example 48: 3-(3,5-dimethyl-4-(2-morpholinoethoxy)phenyl)-6,8-
dimethoxyisoquinolin-1 (2H)-one

[0217] (3,5-Dimethoxy-phenyl)-acetic acid (10.0 g, 50.96 mmol) was
dissolved in anhydrous methanol (100 mL) and hSCUO mL) was added
dropwise. The reaction mixture was refluxed overnight. Cooled to room
temperature. The solvent was removed and the residue was dissolved in ethyl
acetate and washed with a saturated aqueous NaHC03 solution, water and dried
(Na2S04). The solvent was evaporated in vacuo to obtain (3,5-dimethoxy-phenyl)-
acetic acid methyl ester (10.4 g, 97%). To a solution of (3,5-dimethoxy-phenyl)-
acetic acid methyl ester (10.4 g, 49.5 mmol) in dimethyl formamide (40 mL),
POCI3 (5.4 mL, 59.4 mmol) was added at 55°C. After the addition, the reaction
mixture was heated at 100°C for 10 min. and then stirred at room temperature
overnight. The reaction mixture was poured into ice-water and extracted with ethyl
-105-

acetate, washed with water, brine, dried over anhydrous Na2S04 and evaporated
in vacuo to obtain (2-formyi-3,5-dimethoxy-phenyl)-acetic acid methyl ester (10.0
g, 85%). (2-Formyl-3,5-dimethoxy-phenyl)-acetic acid methyl ester (5.0 g, 21.0
mmol) was dissolved in CH3CN (100 mL), NaH2P04 (0.655 g, 5.46 mmol) in water
(2 mL) and H202 (2.3 mL, 20.99 mmol, 30%) were added. The reaction mixture
was cooled to 0°C and a solution of Na02CI (2.65 g, 29.4 mmol) in water (5 mL)
was added slowly. The reaction mixture was stirred at room temperature for 4
hours before being quenched by the addition of Na2S03 solution. The mixture was
acidified with 2 N HCI and extracted with ethyl acetate. The solvent was
evaporated in vacuo to obtain 2,4-dimethoxy-6-methoxycarbonylmethyl-benzoic
acid (5.25 g, 98%). To a solution of 2,4-dimethoxy-6-methoxycarbonylmethyl-
benzoic acid (5.25 g, 20.6 mmol) in methanol (50 mL), a solution of NaOH (4.12 g,
103 mmol) in water (20 mL) was added and the reaction mixture was allowed to
stir at room temperature for 3 hours. The solvent was removed, diluted with water
and acidified with 2 N HCI. The compound was extracted with ethyl acetate,
washed with water, brine, dried over anhydrous Na2S04 and evaporated in vacuo
to obtain 2-carboxymethyl-4,6-dimethoxy-benzoic acid (4.65 g, 94%). To a
suspension of 2-carboxymethyl-4,6-dimethoxy-benzoic acid (4.65 g, 19.36 mmol)
in toluene (50 mL) and acetic anhydride (2.01 mL, 21.3 mmol) were refluxed for 2
hours. After cooling to 0 °C, the precipitated solid was filtered off and washed with
heptane and hexane to obtain 6,8-dimethoxy-isochroman-1,3-dione (3.56 g, 83%).
[0218] To a solution of 3,5-dimethyl-4-hydroxy-benzoic acid (3.0 g, 18.05
mmol) in pyridine (7 mL), acetic anhydride (2.05 mL, 21.66 mmol) was added and
the reaction mixture was stirred at room temperature for 16 hours. Water was
added and the compound was extracted with ethyl acetate, washed with water,
brine and dried over anhydrous Na2S04. The solvent was evaporated in vacuo to
obtain 4-acetoxy-3,5-dimethyl-benzoic acid (3.52 g, 94%). To a solution of 4-
acetoxy-3,5-dimethyl-benzoic acid (6.02 g, 28.91 mmol) in CH2CI2 (80 mL), oxalyl
chloride (5.04 mL, 57.83 mmol) was added slowly, followed by a drop of
dimethylformamide. The reaction mixture was stirred at room temperature for 2
hours. The solvent was removed and the solid acid chloride was dried under
vacuum (6.37 g, 97%). To a solution of A/,A/,A/,A/-tetramethyl guanidine (2.77 mL,
22.078 mmol) in CH3CN (50 mL), a solution of 6,8-dimethoxy-isochroman-1,3-
-106-

dione (4.46 g, 20.1 mmol) in CH3CN (100 ml_) was added slowly at temperature -20°C) over 30 min. Et3N (1 eq.) was added in one portion, followed
by a solution of acetic acid 4-chlorocarbonyl-2,6-dimethyl-phenyl ester (6.37 g,
28.1 mmol) in CH3CN (50 mL) and stirred for 30 min. at mixture was stirred at room temperature for 16 hour before being refluxed for 3
hour. After cooling to room temperature, the reaction mixture was quenched with 1
N HCI. The precipitated solid was filtered off to give a mixture of acetic acid 4-(6,8-
dimethoxy-1,3-dioxo-isochroman-4-carbonyl)-2,6-dimethyl-phenyl ester and acetic
acid 4-(6,8-dimethoxy-1 -oxo-1 H-isochromen-3-yl)-2,6-dimethyl-phenyl ester
(combined 6.0 g). The above mixture of compounds (6.0 g) was dissolved in 30%
H2SO4 (30 mL) and heated at 100°C for 2 hours. The reaction mixture was cooled
to room temperature and the precipitated solid-was filtered off to obtain a mixture
of acetic acid 4-(6,8-dimethoxy-1 -oxo-1 H-isochromen-3-yl)-2,6-dimethyl-phenyl
ester and 3-(4-hydroxy-3,5-dimethyl-phenyl)-6,8-dimethoxy-isochromen-1 -one
(5.5 g). The above mixture (5.5 g) was dissolved in methanol (30 mL) and K2C03
(3.09 g, 22.4 mmol) and water (10 mL) were added. The reaction mixture was
stirred at room temperature for 6 hours. The solvent was removed and the mixture
was acidified with diluted HCI. The compound was extracted with ethyl acetate,
washed with water, brine and dried over anhydrous Na2S04. The solvent was
evaporated in vacuo to leave a residue which was purified by chromatography
(Silica Gel, 230-250 mesh; 2% methanol in dichloromethane) to obtain 3-(4-
hydroxy-3,5-dimethyl-phenyl)-6,8-dimethoxy-isochromen-1-one (1.46 g). To a
solution of compound 3-(4-hydroxy-3,5-dimethyl-phenyl)-6,8-dimethoxy-
isochromen-1-one (0.875 g, 2.68 mmol) in DMF (5 mL), NaH (0.129 g, 3.22 mmol)
was added and the mixture was stirred for 1 hour. To the reaction mixture was
added 1-chloro-2-iodo-ethane (1.23 mL, 13.4 mmol) and the mixture was stirred at
room temperature for 16 hour. The reaction mixture was heated at 80°C before
being quenched with 1 N HCI at room temperature. The crude was purified by
column chromatography (Silica Gel, 230-250 mesh; 2% methanol in
dichloromethane) to give 3-[4-(2-hloro-ethoxy)-3,5-dimethyl-phenyl]-6,8-
dimethoxy-isochromen-1-one (0.36 g, 35%). The compound 3-[4-(2-hloro-
ethoxy)-3,5-dimethyl-phenyl]-6,8-dimethoxy-isochromen-1-one (0.36 g, 0.93
mmol) was dissolved in DMSO (5 mL) and morpholine (0.4 mL, 4.63 mmol) and
-107-

Et3N (0.64 mL, 4.63 mmol) were added. The reaction mixture was heated at
110°C for 16 h before being cooled to room temperature. Water was added and
the compound was extracted with ethyl acetate. The solvent was evaporated in
vacuo to leave a residue which was purified by chromatography (Silica Gel, 230-
250 mesh) to give 3-[3,5-dimethyl-4-(2-morpholin-4-yl-ethoxy)-phenyl]-6,8-
dimethoxy-isochromen-1-one (0.13 g, 31%). The compound 3-[3,5-dimethyl-4-(2-
morpholin-4-yl-ethoxy)-phenyl]-6,8-dimethoxy-isochromen-1-one (0.13 g, 0.29
mmol) and NH3 (2.0 M solution in ethanol, 30 mL) were mixed in a steel bomb and
heated at 130°C for 16 hours. The solvent was removed and the crude compound
was purified by chromatography (Silica Gel, 230-250 mesh). The compound was
then converted into a salt by treatment with HCI in ether to give 3-(3,5-dimethyl-4-
(2-morpholinoethoxy)phenyl)a6,8-di?TLethoxyisoquinolin-1(2H)-one (80 mg, 59 %);
MS (ES) m/z: 349 (M+1); MP 196-198°C
Example 49: 5-methyl-2-(pyridin-4-yl)-4H-chromen-4-one

[0219] In a solution of 2-methoxy-6-methylbenzoic acid ethyl ester (5 g,
25.77 mmol) and NaOH (6.18 g, 154.64 mmol) in EtOH (100 mL) and water (40
mL) was stirred at reflux for 24 hours. EtOH was then removed using a rotary
evaporator and the aqueous was acidified with HCI (1 N) to pH=4. Extract with
CH2CI2 (3X100 mL) followed by concentration using a rotary evaporator afforded
4.25 g of 2-methoxy-6-methylbenzoic acid (100%) as a white solid. To a solution
of 2-methoxy-6-methylbenzoic acid (1.66 g, 10 mmol) in CH2CI2 (80 mL) at room
temperature was added BBr3 in CH2CI2 (20 mL, 20 mmol). The reaction mixture
was stirred at room temperature for 20 hour and then concentrated using a rotary
evaporator. The resulting residue was re-dissolved in CH2CI2 (50 mL), diluted with
HCI (0.5 N), extracted with CH2CI2 (3x100 mL) and concentrated using a rotary
evaporator to afford 1.52 g of 2-hydroxy-6-methyIbenzoic acid (100%). To a
solution of 2-hydroxy-6-methylbenzoic acid (1.52 g, 10 mmol) in THF (50 mL) at
room temperature was slowly added CH3Li in ether (22 mL, 35 mmol) and the
suspension was stirred at 60°C for 6 hour. The reaction was quenched with HCI
-108-

(0.5 N) aqueous and extracted with CH2Cl2( 3> rotary evaporator afforded 1 g of 2'-hydroxy-6'-methyiacetophenone (67%) as a
brown oil. A solution of 2'-hydroxy-6'-methylacetophenone (1.0 g, 6.67 mmol) in
CH2CI2 (50 mL) at room temperature was mixed with isonicotinoyl chloride
hydrochloride (2.136 g, 12 mmol) and triethylamine (3.9 mL, 28 mmol)
sequentially. The resulting mixture was stirred at room temperature for 2 hours,
quenched with water, and extracted with CH2CI2 ( 3x100 mL) The volume was
reduced using a rotary evaporator to minimal and triturated with hexanes. The
solid was collected by filtration to afford 1.2 g of the corresponding isonicotinic aryl
ester (70%). A solution of the above isonicotinic aryl ester (1.2 g, 4.70 mmol) in
THF (50 mL) was mixed with potassium tert-butoxide (2.24 g, 20 mmol) and
stirred at 65°C foji2 hours. The reaction was quenched with water and acidified
with HCI (0.5 N) to pH = 6. Extract with CH2CI2 (3x100 mL) followed by
concentration using a rotary evaporator afforded a yellow solid residue. It was
purified by column (Si02, hexane / EtOAc = 1:1) to provide 0.72 g of the diketone
(60%). A solution of the above diketone (0.7 g, 2.745 mmol) in HOAc (50 mL)
was stirred at reflux for 2 hours. All the solvent was removed using a rotary
evaporator to afford a solid residue. It was then diluted with water and neutralized
with NaOH (0.5 N) to pH = 8. The solid was collected by filtration and washed with
water and hexanes sequentially to afford 0.32 g of 5-methyl-2-(pyridin-4-y!)-4H-
chromen-4-one as a light yellow solid (49%).
Example 50: 6-((dimethylamino)methyl)-2-(pyridin-4-yl)-4H-chromen-4-one

[0220] In a solution of 2'-hydroxyacetophenone (10 g, 73.53 mmol) in 12
N HCI (160 mL) at room temperature was mixed with paraformaldehyde (2.43 g,
80.88 mmol) and stirred at 40°C for 8 hours. The reaction was diluted with water,
extracted with CH2CI2 (3x100 mL), and concentrated using a rotary evaporator to
provide 13 g of 5'-chloromethyl-2'-hydroxyacetophenone (98%). To a solution of
5!-chloromethyl-2'-hydroxyacetophenone (4 g, 21.74 mmol) in THF (50 mL) at
-109-

room temperature was added dimethylamine in THF (13 ml_, 26 mmol). The
reaction mixture was stirred at 60°C for 6 hours. It was quenched with water and
neutralized with potassium carbonate to pH = 8. Extract with CH2CI2 (3x100 ml_)
followed by concentration using a rotary evaporator provided 3.86 g of 5'-(N,N-
dimethylaminomethy)-2'-hydroxyacetophenone (92%). A solution of 5'-(N,N-
dimethylaminomethy)-2'-hydroxyacetophenone (1.4 g, 7.25 mmol) and ethyl
isonicotinate (1.1 g, 7.25 mmol) in THF (100 mL) at room temperature was mixed
with NaH (1.02 g, 25.375 mmol) and was stirred at reflux for 6 hours. The reaction
was quenched with water and extracted with CH2CI2 (3x100 mL). The volume was
reduced using a rotary evaporator to minimal and triturated with hexanes. The
solid was collected by filtration to afford 1.85 g of the corresponding diketone
(86%). A solution of the above diketone (1.85 g,6.19 mmol) in HOAc (100 mL)
was stirred at reflux for 2 hours. All the solvent was removed using a rotary
evaporator to afford a solid residue. It was then re-dissolved in CH2CI2, diluted
with water and neutralized with potassium carbonate to pH = 8, extracted with
CH2CI2 (3x100 mL) and concentrated using a rotary evaporator The solid residue
was purified by column (Si02, hexanes / EtOAc / MeOH = 2:2:1) to afford 1.4 g of
the intermediate (80%). A solution of the above intermediate (0.7 g, 2.34 mmol) in
CH2CI2 (20 mL) was mixed with HCI in ether (10 mL, 20 mmol) and stirred at room
temperature for 30 min. The solid was collected by filtration and washed with
CH2CI2 and MeOH sequentially to obtain 0.48 g of the 6-((dimethylamino)methyl)-
2-(pyridin-4-yl)-4H-chromen-4-one hydrochloride (60%) as an off-white solid.
Example 51: 5-(hydroxymethyl)-2-(pyridin-4-yl)-4H-chromen-4-one

[0221] In a solution of 2-methoxy-6-methylbenzoic acid ethyl ester (5 g,
25.77 mmol) and NaOH (6.18 g, 154.64 mmol) in EtOH (100 mL) and water (40
mL) was stirred at reflux for 24 hours. EtOH was then removed using a rotary
evaporator and the aqueous was acidified with HCI (1 N) to pH=4. Extract with
CH2CI2 (3x100 mL) followed by concentration using a rotary evaporator afforded
-110-

4.25 g of 2-methoxy-6-methylbenzoic acid (100%) as a white solid. To a solution
of 2-methoxy-6-methylbenzoic acid (3.5 g, 21 mmol) in CH2CI2 (100 mL) at room
temperature was added BBr3 in CH2CI2 (42 mL, 42 mmol). The reaction mixture
was stirred at room temperature for 14 hrs and then concentrated using a rotary
evaporator. The resulting residue was re-dissolved in CH2CI2 (50 mL), diluted with
HCI (0.5 N), extracted with CH2CI2 (3x100 mL) and concentrated using a rotary
evaporator to afford 3.3 g of 2-hydroxy-6-m ethyl benzoic acid (100%). To a
solution of 2-hydroxy-6-methylbenzoic acid (3.3 g, 21.7 mmol) in THF (200 mL) at
room temperature was slowly added CH3Li in ether (47 mL, 76 mmol) and the
suspension was stirred at 60°C for 6 hour. The reaction was quenched with HCI
(0.5 N) aqueous and extracted with CH2CI2 (3x100 mL). Concentration using a
rotary evaporator afforded an oily residue. It was purified by column (Si02,
hexane / EtOAc = 4:1) to provide 3 g of 2'-hydroxy-6'-methylacetophenone (92%)
as a light yellow oil. A solution of 2'-hydroxy-6'-methylacetophenone (1.5 g, 10
mmol) in CH2CI2 (50 mL) at room temperature was mixed with isonicotinoyl
chloride hydrochloride (2.0 g, 11 mmol) and triethylamine (4.9 mL, 35 mmol)
sequentially. The resulting mixture was stirred at room temperature for 14 hours,
quenched with water, and extracted with CH2CI2 (3x100 mL). Concentration using
a rotary evaporator afforded a solid residue. It was purified by column (Si02,
hexane / EtOAc = 3:1) to provide 1.5 g of the corresponding isonicotinic aryl ester
(59%) as a light yellow solid. A solution of the above isonicotinic aryl ester (1.5 g,
5.88 mmol) in THF (100 mL) was mixed with potassium tert-butoxide (1.384 g,
12.35 mmol) and stirred at reflux for 2 hours. The reaction was quenched with
water and acidified with HCI (0.5 N) to pH = 6. Extract with CH2CI2 (3x100 mL)
followed by concentration using a rotary evaporator afforded a yellow solid
residue. It was purified by column (Si02, hexane / EtOAc = 1:1) to provide 1.2 g of
the diketone (80%). A solution of the above diketone (1.2 g, 24.71 mmol) in HOAc
(100 mL) was stirred at reflux for 2 hours. All the solvent was removed using a
rotary evaporator to afford a solid residue. It was then diluted with water and
neutralized with NaOH (0.5 N) to pH = 8. The solid was collected by filtration and
washed with water and hexanes sequentially to afford 1 g of 5-methyl-2-(pyridin-4-
yl)-4H-chromen-4-one as a light yellow solid (89%). A solution of 5-methyl-2-
(pyridin-4-yl)-4H-chromen-4-one (0.85 g, 3.59 mmol) in dry carbon tetrachloride
-111-

(250 mL) was mixed with NBS (0.67 g, 3.77 mmol) and benzyl peroxide (0.1 g,
0.422 mmol). The reaction mixture was stirred at reflux for 6 hours. After cooling
the solvent was removed and the residue was further washed with hot water to get
rid of succinimide. The solid was then purified by column (Si02, hexanes / EtOAc
= 1:1) to yield 0.61 g of bromide (54%). A solution of the above bromide (0.61 g,
1.93 mmol) and NaOAc (1.82 g, 22.15 mmol) in HOAc (50 mL) was stirred at
reflux for 6 hours.. All the solvent was removed using a rotary evaporator to afford
a solid residue. It was then diluted with water, extracted with CH2CI2 (3x100 mL),
and concentrated using a rotary evaporator. The solid was purified by column
(Si02, hexanes / EtOAc / MeOH = 2:2:1) to yield 0.3 g of the corresponding
acetate (53%). A solution of the above acetate (0.3 g, 1.01 mmol) and potassium
carbonate (0.414 g, 3.0 mmol) in MeOH-(30 mL)-and water (3 mL) was stirred at
room temperature for 48 hours. MeOH was removed using a rotary evaporator
and the resulting mixture was further diluted with water (25 mL) to get a
suspension. The solid was collected by filtration and washed with water and
hexanes to yield 0.16 g of 5-hydroxymethyl intermediate (65%) as a light yellow
solid. A suspension of the above intermediate (0.114 g, 0.45 mmol) in ethyl ether
(10 mL) was mixed with HCI in ether (10 mL, 20 mmol) and the mixture was
stirred at room temperature for 2 hours to get a even finer suspension. The solid
was collected by filtration and washed with hexanes to yield 0.126 g of 5-
(hydroxymethyl)-2-(pyridin-4-yl)-4H-chromen-4-one (96%) as a light yellow solid.
[0222] The ability of a compound of the present invention to inhibit the
expression of VCAM-1, MCP-1, and/or SMC proliferation, or in the treatment of
diseases in a host can be assessed using methods known to those skilled in the
art, including those described below.
Example 52 MCP-1 and VCAM-1 Assays
[0223] Compounds were dissolved in DMSO, aliquoted, and stored at
-20°C. Cultured human vascular endothelial cells (HUVECs) were seeded in 96-
well plates in complete EGM-2 media (-100 uL/well); cells were plated at ~2-
3> the following day cells are stimulated with TNF-a (~1 ng/mL) in the presence or
-112-

absence of compounds dissolved in DMSO. Triplicate wells were used for each
test. To establish a dose curve and an IC50, multiple concentrations in 2- to 5-fold
increments were used. Cells were exposed to TNF-a and compounds for
approximately 16 hours. The next day, cells were visually examined via light
microscopy to score for visual signs of toxicity. Cell culture media was analyzed
using an MCP-1 ELISA. Cells were refed (-100 uL/well) with 20% CellTiter 96
Aqueous One Cell Proliferation Solution (Promega), 80% EGM-2 medium. Media
optical density (at 490 nm) was determined after 1 hour. Plates were aspirated
and cell lysates were prepared and these lysates were tested using a VCAM-1
ELISA.
[0224] In Table 2, a positive result (+) was defined as at least 50%
inhibition of the protein levels MCP-1 or VCAM-1, as determined by the ELISA.
For comparison, resveratrol, a naturally occurring polyphenol, demonstrated 47%
inhibition of MCP-1 and 54% inhibition of VCAM-1.
Example 53 Smooth Muscle Cell Proliferation Protocol
[0225] Compounds were dissolved in DMSO, aliquoted, and stored at
-20°C. Human coronary artery smooth muscle cells (CASMCs) were plated in 96-
well plates and were grown in SmBM-2 media. After 1-2 hours, media was
aspirated and replaced with serum-free ME/F12 media, except the controls. Cells
were incubated for a further 48 hours. Compounds were diluted in DME/F12
containing 10% FBS. Media was aspirated from the plates and compounds in
DME/F12 containing 10% FBS. Six wells were used per condition and duplicate
plates were used. Cells were incubated for a further 72 hours. Media was
aspirated from one set of plates; those cells were refed (-100 uL/well) with 20%
CellTiter 96 Aqueous One Cell Proliferation Solution (Promega), 80% EGM-2
medium. Media optical density (at 490 nm) was determined after 3-4 hours. In
the second set of plates, serum-free DME/F12 media (20uL) was added to each
well. Part of the supernatant (50uL) was removed and placed in an ELISA plate
and was stored temporarily at 4°C. The remaining media and cells in the second
set of plates were freeze-thawed for four cycles. The lysates and supematants
were mixed and centrifuged. Part of the supernatant (50uL) was removed and
-113-

placed in an ELISA plate. The Promega Cytotox assay was performed on the
ELISA plates. The ratio of supernatant OD to supernatant+cell lysate OD was
determined.
[0226] In Table 2, a positive result (+) was defined as at least 40%
inhibition of the proliferation of SMC, as determined by the assay. For comparison,
rapamycin, a known inhibitor of SMC proliferation, demonstrated 43% inhibition.











-119-


-120-




[0227] Modifications and variations of the present invention relating to
compounds and methods of treating diseases will be obvious to those skilled in
the art from the foregoing detailed description of the invention. Such modifications
and variations are intended to come within the scope of the appended claims.
The practice of the present invention employs, unless otherwise indicated,
conventional methods of organic and medicinal chemistry, cell and tissue culture,
and animal husbandry within the ordinary skill of the art. Such techniques are
explained fully in the literature. All publications, patents, and patent applications
cited herein are incorporated by reference in their entirety. To the extent the
present disclosure is contradictory to the disclosure of PCT/US2005/038048
and/or U.S. provisional application No. 60/704,035, the present application
supercedes their disclosure. It is intended that the specification and examples be
considered as exemplary only, with a true scope and spirit of the invention being
indicated by the following claims.
-122-

WHAT IS CLAIMED IS:
1. A method for inhibiting VCAM-1 expression, MCP-1 expression
and/or SMC proliferation in a mammal, comprising administering a therapeutically
effective amount of a compound of Formula 1:

wherein:
X is selected from CRu, CRnR-13, CO, CS, O, S, SO, S02, N and NRn,
wherein Rn may be the same or different than R13;
Y is selected from CR12, CR12R14, CO, CS, O, S, SO, S02, N and NR12,
wherein Ri2 may be the same or different than Ru,
R-i, R2, R3, R4, R5, Re, R7, Re, R9, R10, R11, R12, R13, Rand Ri7are each
independently selected from alkoxy, aryloxy, alkyl, alkenyl, alkynyl, amide, amino,
aryl, arylalkyl, carbamate, carboxy, cyano, cycloalkyl, ester, ether, formyl,
halogen, haloalkyl, heteroaryl, heterocyclyl, hydrogen, hydroxyl, ketone, nitro,
phosphate, sulfide, sulfinyl, sulfonyl, sulfonic acid, sulfonamide and thioketone, or
two adjacent substituents selected from R1, R2, R3. R4, R5, R6. R7. Rs. R9,
R10, R11, R12, R13. and R14 are connected in a 5 or 6-membered ring to form a
bicyclic aryl, bicyclic heteroaryl or bicyclic heterocyclyl;
each W is independently selected from C and N, wherein if W is N, then p
is 0 and if W is C, then p is 1;
Z-i, Z2 and Z3 are each independently selected from a single bond and a
double bond;
wherein if Y is O, then X is not CO;
wherein if at least one W is not N, then
a) X and Y are each CO,
b) X is NR-11 and Z2 is a double bond, or
-123-

c) two adjacent substituents selected from R5, R6, R7, Rs, and R9 are
connected in a 5 or 6-membered ring to form a bicyclic aryl, bicyclic heteroaryl or
bicyclic heterocyclyl;
and pharmaceutically acceptable salts and hydrates thereof.
2. The method of claim 1, wherein R7 is hydroxyl.
3. The method of claim 1, wherein at least one of R1, R2, R3, R4, R5, Re,
R7, Rs, R9, R10, R11, R12, R13, Ri4and R17 is selected from alkoxy, alkyl, amino,
aminoalkoxy, aminoalkyl, carboxyalkoxy, halogen, heterocyclyl,
heterocyclylalkoxy, heterocyclylalkyl, hydroxyalkoxy, hydroxyalkyl, and hydroxyl.
4. The method of claim 1, wherein X is selected from CR-n, CO, N,
NR11 and O; and Y is selected from CR-12, CO, and NR12.
5. The method of claim 4, wherein X is O and Y is CO.
6. The method of claim 1, wherein Z\ and Z3 are single bonds, and Z2
is a double bond.
7. The method of claim 1, wherein Z1 is a double bond and Y is CO.
8. The method of claim 1, wherein Z1 and Z3 are double bonds.
9. The method of claim 1, wherein at least one W in the A ring of
Formula 1 is N.
10. The method of claim 9, wherein the W bonded to (R4)p is N.
11. The method of claim 1, wherein the W bonded to (Rio)P is N.
12. The method of claim 1, wherein at least one W in the C ring of
Formula 1 is N.
13. The method of claim 12, wherein the W bonded to (R7V is N.
14. The method of claim 1, wherein the compound of Formula 1 is
selected from
2-(4-Hydroxy-phenyl)-pyrano[2,3-b]pyridin-4-one,
2-(4-Hydroxy-phenyl)-pyrano[3,2-b]pyridin-4-one,
2-(4-Hydroxypheny()-pyrano[2,3-c3pyridin-4-one,
2-(3-Fluoro-4-hydroxyphenyl)pyrano[2,3-b]pyridine-4-one,
2-(4-Hydroxyphenyl)-4H-pyrano[3,2-c]pyridin-4-one,
2-(3-Chloro-4-hydroxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one,
2-(4-Hydroxy-3-methoxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one,
2-(4-Methoxyphenyl)-4H-pyrano[2,3-b]pyridine-4-one,
-124-

2-(4-(2-Hydroxyethoxy)phenyl)-4H-pyrano[2,3-b]pyridine-4-one,
2-Pyridin-4-yl-chromen-4-one,
2-(6-Hydroxypyridin-3-yl)-chromen-4-one,
2-(4-Hydroxy-phenyl)-1 H-quinolin-4-one,
4-lsoquinolin-3-yI-phenol,
2-Fluoro-4-(5-methoxy-1-(methylamino)isoquinolin-3-yl)phenol,
3-(3-Fluoro-4-hydroxyphenyl)-5-methoxyisoquinolin-1(2H)-one,
3-(4-Hydroxyphenyl)-6,8-dimethoxyisoquinolin-1(2H)-one,
2-(4-Hydroxy-phenyl)-[1,4]naphthoquinone,
3-(4-Hydroxyphenyl)-2H-isoquinolin-1-one,
2-Phenyl-4H-pyrano[2,3-b]pyridin-4-one,
2-(4-(hydroxymethyl)pheny!)-4H-pyrano[2,3-b]pyridin-4-one,
2-(4-hydroxy-3,5-dimethylphenyl)-4H-pyrano[2,3-b]pyridin-4-one,
2-(pyridin-3-yl)-4H-chromen-4-one,
7-((dimethylamino)methyl)-2-(4-hydroxyphenyl)-4H-pyrano[2,3-b]pyridin-4-one
dihydrochloride,
2-(4-(2-(dimethylamino)ethoxy)phenyl)-4H-pyrano[2,3-b]pyridin-4-one
dihydrochloride,
2-(4-hydroxy-3-(thiophen-2-yl)phenyl)-4H-pyrano[2,3-b]pyridin-4-one,
2-(2,6-dimethyl-4-(4-oxo-4H-pyrano[2,3-b]pyridin-2-yl)phenoxy)aceticacid,
2-(pyridin-4-yl)-4H-pyrano[2,3-b]pyridin-4-one hydrochloride,
2-(3,5-dimethyl-4-(2-morpholinoethoxy)phenyl)-4H-pyrano[2,3-b]pyridin-4-one
hydrochloride,
2-(3-Bromo-4-hydroxyphenyl)-4H-pyrano[2,3-b]pyridin-4-one,
2-(4-hydroxy-3,5-dimethylphenyl)-6-(pyrrolidin-1-ylmethyl)-4H-pyrano[2,3-
b]pyridin-4-one dihydrochloride,
5(7-dimethoxy-2-(pyridin-4-yl)-4H-chromen-4-one hydrochloride,
2-phenyl-6-(pyrrolidin-1-ylmethyl)-4H-pyrano[2,3-b]pyridin-4-one hydrochloride
6-(4-oxo-4H-chromen-2-yl)benzo[d]oxazol-2(3H)-one,
2-(4-fluorophenyl)-6-(pyrrolidin-1-ylmethyl)-4H-pyrano[2,3-b]pyridin-4-one
hydrochloride,
2-(4-aminophenyl)-4H-pyrano[2,3-b]pyridin-4-one hydrochloride,
-125-

2-(4-isopropoxyphenyl)-6-(pyrrolidin-1-ylmethyl)-4H-pyrano[2,3-b]pyridin-4-one
hydrochloride,
7-(4-hydroxy-3,5-dimethylphenyl)-1,6-naphthyridin-5(6H)-one hydrochloride,
2-hydroxy-7-(4-hydroxy-3,5-dimethylphenyl)-4-methoxy-1,6-naphthyridin-5(6H)-
one dihydrochloride,
3-(4-(2-hydroxy-2-methylpropoxy)-3,5-dimethylphenyl)-6,8-dimethoxyisoquinolin-
1(2H)-one,
2,6-dimethyl-4-(1-(methylamino)-7-((4-methylpiperazin-1-yl)methyl)isoquinolin-3-
yl)phenol trihydrochloride,
2-(quinoxalin-6-yl)-4H-pyrano[2,3-b]pyridin-4-one,
4-(5-amino-2,4-dimethoxy-1,6-naphthyridin-7-yl)-2,6-dimethylphenol,
2-(4-fluorophenyl)-6-(morpholinomethyl)quinazolin-4(3H)-one,
2-(1H-indazol-5-yl)-6-(morpholinomethyl)-4H-pyrano[2,3-b]pyridin-4-one,
3-(3,5-dimethyl-4-(2-morpholinoethoxy)phenyl)-6,8-dimethoxyisoquinolin-1(2H)-
one, and
6-((dimethylamino)methyl)-2-(pyridin-4-yl)-4H-chromen-4-one.
15. The method of claim 1, wherein the therapeutically effective amount
of the compound of Formula 1 is administered with a pharmaceutical acceptable
carrier in a pharmaceutically acceptable composition.
16. The method of claim 15, wherein the pharmaceutically acceptable
composition comprises a second therapeutic agent selected from a statin, a PPAR
agonist, a bile-acid-binding-resin, niacin, a RXR agonist, an anti-obesity drug, a
hormone, a tyrophostine, a sulfonylurea-based drug, a biguanide, an alpha-
glucosidase inhibitor, apolipoprotein E, a cardiovascular drug, an HDL-raising
drug, an HDL enhancer, or a regulator of the apolipoprotein A-IV and/or
apolipoprotein genes.
17. The method of claim 1, wherein the therapeutically effective amount
of the compound of Formula 1 is administered as a pharmaceutically acceptable
composition, a pharmaceutically acceptable salt, or a pharmaceutically acceptable
formulation; optionally in a combination or alternation therapy with a therapeutic
agent or at least one compound of Formula 1.
-126-

18. The method of claim 1, wherein the therapeutically effective amount
of the compound of Formula 1 is administered through the use of an intraluminal
stent.
19. The method of claim 1, wherein VCAM-1 expression is inhibited.
20. The method of claim 1, wherein MCP-1 expression is inhibited.
21. The method of claim 1, wherein SMC proliferation expression is
inhibited.
22. The method of claim 1, further comprising treating, preventing or
mitigating inflammatory conditions and related disease states, characterized by
altered expression of markers of inflammation selected from VCAM-1, MCP-1
and/or SMC proliferation.
23. The method of claim 22, wherein the inflammatory conditions are
selected from cardiovascular or inflammatory disorders mediated by VCAM-1,
MCP-1, and/or SMC proliferation.
24. The method of claim 23, wherein the inflammatory conditions are
cardiovascular diseases mediated by VCAM-1, MCP-1, and/or SMC proliferation.
25. The method of claim 23, wherein the inflammatory conditions are
inflammatory disorders mediated by VCAM-1 and/or MCP-1.
26. The method of claim 23, wherein the inflammatory condition is
restenosis.
27. The method of claim 22, wherein the therapeutically effective
amount of the compound of Formula 1 is administered prior to revascularization
therapy.

wherein:
X is selected from CRu, CO, N, NRn and O;
-127-
28. A compound of Formula I:

Y is selected from CR12, CO, and NR12;
Ri, R2, R3, R4, R5, R6. R7, Re, R9, R10, R11, R12, R13, Rand Ri7are each
independently selected from alkoxy, alkyl, amino, aminoalkoxy, aminoalkyl,
carboxyalkoxy, halogen, heterocyclyl, heterocyclylalkoxy, heterocyclylalkyl,
hydrogen, hydroxyalkoxy, hydroxyalkyl, and hydroxyl, or
two adjacent substituents selected from R5, R6, R7, Rs and R9 are
connected in a 5 or 6-membered ring to form a bicyclic aryl, bicyclic heteroaryl or
bicyclic heterocyclyl;
each W is independently selected from C and N, wherein if W is N, then p
is 0 and if W is C, then p is 1;
Z-i, Z2 and Z3 are each independently selected from a single bond and a
double bond;
wherein if at least one W is not N, then
a) X and Y are each CO, or
b) X is NR11 and Z2 is a double bond;
and pharmaceutical acceptable salts and hydrates thereof.
29. The compound of claim 28, wherein R7 is hydroxyl.
30. The compound of claim 28, wherein X is O and Y is CO.
31. The compound of claim 28, wherein Z1 and Z3 are single bonds, and
Z2 is a double bond.
32. The compound of claim 28, wherein Z1 is a double bond and Y is
CO.
33. The compound of claim 28, wherein Zt and Z3 are double bonds.
34. The compound of claim 28, wherein at least one W in the A ring of
Formula 1 is N.
35. The compound of claim 28, wherein the W bonded to (R4)p is N.
36. The compound of claim 28, wherein the W bonded to (Rio)P is N.
37. The compound of claim 28, wherein at least one W in the C ring of
Formula 1 is N.
38. The compound of claim 28, wherein the W bonded to (R7)p is N.
39. A pharmaceutical composition comprising the compound of claim 28
and a pharmaceutically acceptable carrier.
-128-

40. A method for inhibiting VCAM-1 expression, MCP-1 expression
and/or SMC proliferation in a mammal, comprising administering a therapeutically
effective amount of the compound of claim 28.
41. A method for treating, preventing or mitigating inflammatory
conditions and related disease states, characterized by altered expression of
markers of inflammation selected from VCAM-1, MCP-1 and/or SMC proliferation,
comprising administering a therapeutically effective amount of the compound of
claim 28.
-129-

The present invention relates to polyphenol-like compounds that are useful for inhibiting VCAM-1 expression,
MCP-1 expression and/or SMC proliferation in a mammal. The disclosed compounds are useful for regulating markers of inflammatory conditions, including vascular inflammation, and for treatment and prevention of inflammatory and cardiovascular diseases
and related disease states.

Documents:

00498-kolnp-2008-abstract.pdf

00498-kolnp-2008-claims.pdf

00498-kolnp-2008-correspondence others.pdf

00498-kolnp-2008-description complete.pdf

00498-kolnp-2008-form 1.pdf

00498-kolnp-2008-form 3.pdf

00498-kolnp-2008-form 5.pdf

00498-kolnp-2008-international publication.pdf

00498-kolnp-2008-international search report.pdf

00498-kolnp-2008-pct priority document notification.pdf

00498-kolnp-2008-pct request form.pdf

498-KOLNP-2008-(05-09-2013)-ANNEXURE TO FORM 3.pdf

498-KOLNP-2008-(05-09-2013)-CORRESPONDENCE.pdf

498-KOLNP-2008-(26-08-2013)-ANNEXURE TO FORM 3.pdf

498-KOLNP-2008-(26-08-2013)-CLAIMS.pdf

498-KOLNP-2008-(26-08-2013)-CORRESPONDENCE.pdf

498-KOLNP-2008-(26-08-2013)-FORM-1.pdf

498-KOLNP-2008-(26-08-2013)-FORM-2.pdf

498-KOLNP-2008-(26-08-2013)-FORM-5.pdf

498-KOLNP-2008-(26-08-2013)-OTHERS.pdf

498-KOLNP-2008-(26-08-2013)-PETITION UNDER RULE 137.pdf

498-KOLNP-2008-(27-07-2009)-FORM 13.pdf

498-KOLNP-2008-(28-02-2013)-CORRESPONDENCE.pdf

498-KOLNP-2008-(28-02-2013)-OTHERS.pdf

498-KOLNP-2008-(28-02-2013)-PA.pdf

498-KOLNP-2008-ASSIGNMENT.pdf

498-KOLNP-2008-CORRESPONDENCE OTHERS 1.1.pdf

498-KOLNP-2008-CORRESPONDENCE OTHERS 1.2.pdf

498-KOLNP-2008-FORM 3-1.1.pdf

498-KOLNP-2008-GPA.pdf


Patent Number 264416
Indian Patent Application Number 498/KOLNP/2008
PG Journal Number 01/2015
Publication Date 02-Jan-2015
Grant Date 29-Dec-2014
Date of Filing 04-Feb-2008
Name of Patentee RESVERLOGIX CORP.
Applicant Address 202, 279 MIDPARK WAY SE COLGARY, ALBERTA T2X 1M2
Inventors:
# Inventor's Name Inventor's Address
1 CHIACCHIA FABRIZIO S 130, 603 7TH AVENUE NE, CALGARY, ALBERTA T2E 0N4
2 WONG NORMAN C.W. 616 EDGEMONT BAY NW, CALGARY, ALBERTA T3A 2K8
3 JOHANSSON JAN O 165 MERANO STREET, DANVILLE, CA 94526
4 HANSEN HENRIK C 4903 CARNEY ROAD NW, CALGARY, ALBERTA T2L, 1E6
PCT International Classification Number A61K 31/4353
PCT International Application Number PCT/US2006/029827
PCT International Filing date 2006-07-28
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 60/704035 2005-07-29 U.S.A.