Title of Invention

"THE INDENO [1,2-c] ISOQUINOLINE COMPOUND OF FORMULA (III) AND METHOD FOR MAKING THE SAME"

Abstract The invention provides novel classes of substituted Indeno[l,2-c]isoquinoline Compounds. Pharmaceutical compositions and methods of making and using the compounds, are also described.
Full Text ThE Present invention relates to the indeno[l,2-c] isoquinoline compound and methed for making the same.
This application is a continuation-in-part of U.S. Application No. 09/944,524, filed August 31;2001, which is incorporated by reference herein in its entirety.
1. FIELD OF THE INVENTION
The invention relates to indenofl ,2-c]isoquinoline compounds; compositions comprising an indeno[l,2-c]isoquinoline compound; and methods for treating or preventing an inflammatory disease or ateperfusion disease.
2. BACKGROUND OF THE INVENTION
Inflammatory diseases, such as arthritis, colitis, and autoimmune diabetes, typically manifest themselves as disorders distinct from those associated with, reperfusion diseases, e.g., stroke and heart attack, and can clinically manifest themselves as different entities. However, there can be common underlying mechanisms between these two types of disorders. In particular, inflammatory disease and reperfusion disease can induce proinflammatory cytokine and chemokine synthesis which can, in turn, result in production of cytotoxic free radicals such as nitric oxide and superoxide. NO and superoxide can react to form peroxynitrite (ONOO') (Szabo et al, Shock 6:79-88, 1996).
The ONOO'-induced cell necrosis observed in inflammatory disease and in reperfusion disease involves the activation of the nuclear errzyme poly (ADP-ribose) synthetase (PARS). Activation of PARS is thought to be an important step in the cell-mediated death observed in inflammation and reperfusion disease (Szabo et al., Trends Pharmaco!. Sci. 19: 287-98, 1998).
A number of PARS inhibitors have been described in the art. See, e.g., Banasik et al.., J. Biol. Chem., 267:1569-75, 1992, and Banasik et al., Mol. Cell. Biochem., 138:185-97, 1994; WO 00/39104; WO 00/39070; WO 99/59975; WO 99/59973: WO 99/11649; WO 99/11645; WO 99/11644; WO 99/11628; WO 99/11623; WO 99/11311; WO 00/42040; Zhang et al., Biochem. Biophys. Res. Commun., 278:590-98,2000; White et al.., J. Med. Chem., 43 :4084-4097, 2000; Griffin et al., J. Med. Chem., 41:5247-5256, 1998; Shinkwin et al., Bioorg. Med. Chem., 7:297-308, 1999; and Soriano et al., Nature Medicine, 7:108-113, 2001. Adverse effects associated with administration of PARS inhibitors have been discussed in Milan et al, Science, 223:589-591,1984.



Indeno[l,2-c)isoquinoline derivatives have been previously discussed in the
art. For example, cytotoxic non-camptothecin topoisomerase I inhibitors are reported in
Cushman et al, J. Med. Chem., 43:3688-3698, 2000 and Cushman et al., J. Med. Chem.
42:446-57, 1999; indeno[l,2-c]isoquinolines are reported as antineoplastic agents in
Cushman et al, WO 00/21537; and as neoplasm inhibitors in Hrbata et al, WO 93/05023.
Syntheses of indeno[l,2-c]isoquinoline derivatives have been reported. For example,
see Wawzoneke/a/.,Org. Prep. Proc. Int. 14:163-8,1982; Wawzoneke/a/.,Can. J. Chem.
59:2833, 1981; Andoi et al, Bull. Chem. Soc. Japan, 47:1014-17, 1974; Dusemund et al,
Arch. Pharm (Weinheim, Ger.), 3 17:381-2, 1984; and Lai et al., Indian J. Chem., Sect. B,
388:33-39, 1999.
There remains, however, a need in the art for compounds useful for treating or
preventing inflammatory diseases or reperfusion diseases.
Citation of any reference in Section 2 of this application is not an admission that the
reference is prior art.
3. SUMMARY OF THE INVENTION
The invention is based in part on the discovery of novel substituted tetracyclic
benzamide derivatives and their demonstrated effects in the treatment of inflammation, cell
death and in treating shock and reperfusion diseases.
Accordingly, in one aspect the invention includes a compound of Formula I ,
Formula la, Formula Ib, Formula II or Formula III, or a pharmaceutically acceptable salt or
hydrate thereof (an "Indeno[l,2-c]isoquinoline Compound") as set forth below in the
Detailed Description of the Invention.
Also provided by the invention is a method for treating or preventing an
inflammatory disease or a reperfusion diseasein a subject, comprising administering to a
subject in need of such treatment or prevention an effective amount of an Indeno[l,2-
cjisoquinoline Compound.
In a further aspect, the invention also includes a method for making an Indeno[l,2-
c]isoquinoline Compound.
(Figure removed)
The Indeno[l,2-c]isoquinoline Compounds can be used to treat or prevent a variety
of conditions and diseases, including, but not limited to, an inflammatory disease or a
reperfusion disease.
The invention also includes pharmaceutical compositions that comprise an effective
amount of an Indeno[l,2-c]isoquinoline Compound and a pharmaceuticaJly acceptable
carrier. The compositions are useful for treating or preventing an inflammatory disease or a
reperfusion disease. The invention includes an Indeno[l,2-c]isoquinoline Compound when
provided as a pharmaceutically acceptable prodrug, a hydrated salt, such as a
pharmaceutically acceptable salt, or mixtures thereof.
The details of the invention are set forth in the accompanying description below.
Although any methods and materials similar or equivalent to those described herein can be
used in the practice or testing of the present invention, illustrative methods and materials are
now described. Other features, objects, and advantages of the invention will be apparent
from the description and from the claims. In the specification and the appended claims, the
singular forms also include the plural unless the context clearly dictates otherwise. Unless
defined otherwise, all technical and scientific terms used herein have the same meaning as
commonly understood by one of ordinary skill in the art to which this invention belongs. All
patents and publications cited in this specification are incorporated by reference.
4. DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a novel class of Indeno[l,2-c]isoquinoline
Compounds according to Formula I, Formula la, Formula Ib, Formula II and Formula II, as
set forth below:
(I)
and pharmaceutically acceptable salts and hydrates thereof,
wherein:
R5 is O, NH or S;
R« is -H or C,-C4 alkyl;
X is -C(0)-, -CH2-, -CH(halo)-, -CH(OH)(CH2)n-, -CH(OH)-arylene-, -O-, -NH-,
-S- or -CH(NR,,R,2)-, wherein n is an integer ranging from 0-5;
R,, and R12 are independently -hydrogen or -C,-C9 alkyl, or N, Rn and R12 are taken
together to form a heterocyclic amine;
R,, R2, R3 R4 R7, Rg, R, and R,0 are independently -hydrogen, -halo, -hydroxy,
-O-(C,-C5 alkyl), -C, -CIO alkyl, -alkylhalo, -C2-C10 alkenyl, -C3-C8 carbocycle, -aryl, -NH2,
-alkylamino, -C(0)OH, -C(O)O(C,-C3 alkyl), -OC(O)(C,-C5 alkyl), NO2 or -A-B;
wherein A is -S02-, -SO2NH-, -NHCO-, -NHCONH-, -O-, -CO-, -OC(O)-,
-C(O)O-, -CONH-, -CON(C,-C4 alkyl)-, -NH-, -CH2-, -S- or -C(S)-;
B is -C,-C10 alkyl, -C2-C10 alkenyl, -heterocycle, -C3-C8 carbocycle, -aryl, -NZ,Z2,
-alkylamino, -aminodialkyl, -alkylheterocycle, -arylamido, -C(O)OH, -C(O)O-(CrC3 alkyl)
or-C(O)O-phenyl, any of which are unsubstituted or substituted with one or more of
-O-(C,-C3 alkyl), -halo, -alkylhalo, -alkanol, -alkylamino, -hydroxy, -NO2, -NH2,
-aminoalkyl, -aminodialkyl, -heterocyclic amine, -C,-C10 alkyl, -C2-C10 alkenyl,
-C2-C|0 alkynyl, -aryl, -benzyl, -alkylamido , -alkylcarboxy,
-C,-C5 alkylene-C(O)O-C,-C5 alkyl or -C,-C5 alkylene-OC(O)-C,-C5 alkyl groups; and
Z, and Z2 are independently -H or -CrC|0 alkyl, which is unsubstituted or
substituted with one or more of -halo, -OH or -N(Z3)(Z4), where Z3 and Z4 are
independently, -H or -C,-C5 alkyl, which is unsubstituted or substituted with one or more of
-halo, -hydroxy or -NH2; or N, Z3 and Z4 are taken together to form an unsubstituted or
substituted heterocyclic amine; or N, Z, and Z2 are taken together to form a heterocyclic
amine.
The invention also relates to a compounds of formula (la):
R4 R5
(la)
and pharmaceutically acceptable salts and hydrates thereof,
wherein:
R5 is NH or S;
R«is-HorC,-C4alkyl;
X is -C(0)-, -CH2-, -CH(halo)-, -CH(OH)(CH2)n-, -CH(OH)-arylene-, -O-, -NH-,
-S- or -CH(NR,,R,2)-, wherein n is an integer ranging from 0-5;
R,, and R,2 are independently -hydrogen or -C,-C9 alkyl, or N, R,, and RI2 are taken
together to form a heterocyclic amine;
R,, R2, R3 R4 R7, RU, R, and R,0 are independently -hydrogen, -halo, -hydroxy,
-O-(C,-C5 alkyl), -C, -C10 alkyl, -alkylhalo, -CrC,0 alkenyl, -C3-C8 carbocycle, -aryl, -NH2,
-alkylamino, -C(O)OH, -C(O)O(C,-C5 alkyl), -OC(O)(C,-C5 alkyl), NO2 or -A-B;
wherein A is -SO2-, -SO2NH-, -NHCO-, -NHCONH-, -O-, -CO-, -OC(O)-,
-C(O)0-, -CONH-, -CON(C,-C4 alkyl)-, -NH-, -CH2-, -S- or -C(S)-;
B is -C,-C10 alkyl, -C2-C10 alkenyl, -heterocycle, -C3-C8 carbocycle, -aryl, -NZ^,
-alkylamino, -aminodialkyl, -alkylheterocycle, -arylamido, -C(O)OH, -C(O)O-(CrC5 alkyl)
or-C(O)0-phenyl, any of which are unsubstituted or substituted with one or more of
-0-(C,-C5 alkyl), -halo, -alkylhalo, -alkanol, -alkylamino, -hydroxy, -NO2, -NH2,
-aminoalkyl, -aminodialkyl, -heterocyclic amine, -C,-C,0 alkyl, -C2-C10 alkenyl,
-C2-CIO alkynyl, -aryl, -benzyl, -alkylamido , -alkylcarboxy,
-C,-Cj alkylene-C(O)O-C,-C5 alkyl or -C,-C5 alkylene-OC(O)-C,-C5 alkyl groups; and
Z, and Z2 are independently -H or -C,-C10 alkyl, which is unsubstituted or
substituted with one or more of -halo, -OH or -N(Z3)(Z4), where Z3 and Z4 are
independently, -H or -C,-C5 alkyl, which is unsubstituted or substituted with one or more of
-halo, -hydroxy or -NH2; or N, Z3 and Z4 are taken together to form an unsubstituted or
substituted heterocyclic amine; or N, Z, and Z2 are taken together to form a heterocyclic
amine.
In one embodiment, A is -SO2-.
In another embodiment, R,, R2, R3 R4 R7, Rg, R^ and R)0 are independently
arylalkyl.
In other illustrative embodiments R5 and X in a compound of formula la are as set
forth below:
(Figure removed)
and pharmaceutically acceptable salts and hydrates thereof,
wherein:
R5 is O, NH or S;
R X is -CHr, -CH(halo)-, -CH(OH)(CH2)n-, -CH(OH)-arylene-, -O-, -NH-,
-S- or -CH(NR,,R,2)-, wherein n is an integer ranging from 0-5;
R,, and R12 are independently -hydrogen or -C,-C9 alkyl, or N, R,, and R,2 are taken
together to form a heterocyclic amine.
R,, R2, R3 R4 R7, R8, RS and R10 are independently -hydrogen, -halo, -hydroxy,
-O-(C,-C5 alkyl), -C, -C10 alkyl, -alkylhalo, -C2-C10 alkenyl, -C3-Cg carbocycle, -aryl, -NH2,
-alkylamino, -C(O)OH, -C(O)O(C,-C5 alkyl), -OC(O)(C,-C5 alkyl), NO2 or -A-B;
wherein A is -S02-, -SO2NH-, -NHCO-, -NHCONH-, -O-, -CO-, -OC(O>,
-C(0)O-, -CONH-, -CON(C,-C4 alkyl)-, -NH-, -CH2-, -S- or -C(S)-;
B is -C,-C10 alkyl, -C2-C10 alkenyl, -heterocycle, -C3-Cg carbocycle, -aryl, -NZ,^,
-alkylamino, -aminodialkyl, -alkylheterocycle, -arylamido, -C(O)OH, -C(O)O-(C,-C5 alkyl)
or-C(0)O-phenyl, any of which are unsubstituted or substituted with one or more of
-O-(C,-C5 alkyl), -halo, -alkylhalo, -alkanol, -alkylamino, -hydroxy, -NO2, -NH2,
-aminoalkyl, -aminodialkyl, -heterocyclic amine, -C,-C|0 alkyl, -C2-C,0 alkenyl,
-C2-C10 alkynyl, -aryl, -benzyl, -alkylamido , -alkylcarboxy,
-C,-C5 alkylene-C(O)O-C,-C5 alkyl or -C,-C5 alkylene-OC(O)-C,-C$ alkyl groups; and
Z, and Z2 are independently -H or -C,-C,0 alkyl, which is unsubstituted or
substituted with one or more of -halo, -OH or -N(Z3)(Z4), where Z3 and Z4 are
independently, -H or -C,-C5 alkyl, which is unsubstituted or substituted with one or more of
-halo, -hydroxy or -NH2; or N, Z3 and Z4 are taken together to form an unsubstituted or
substituted heterocyclic amine; or N, Z, and 7^ are taken together to form a heterocyclic
amine.
In one embodiment, A is -SO2-.
In another embodiment, R,, R2, R3 R4 R7, Rg, R,, and R10 are independently
arylalkyl.
In illustrative embodiments R5 and X in a compound of formula Ib are as set forth
below:
(Figure removed)
The invention also relates to compounds of Formula II:
R4 O
(II)
and pharmaceutically acceptable salts and hydrates thereof,
wherein:
R is -H or C,-C4 alkyl;
R,, R2, R3 R4 R7, Rg, Rg and RIO are independently -hydrogen, -halo, -hydroxy,
-O-(C,-C5 alkyl), -C, -CIO alkyl, -alkylhalo, -C2-CIO alkenyl, -C3-C8 carbocycle, -aryl, -NH2,
-alkylamino, -C(O)OH, -C(O)O(C,-C5 alkyl), -OC(O)(C,-C5 alkyl), NO2 or -A-B; wherein
at least one of R1, R4 and R10 is other than hydrogen;
A is -SO2-, -SO2NH-, -NHCO-, -NHCONH-, -O-, -CO-, -OC(O)-, -C(O)O-,
-CONH-, -CON(C,-C4 alkyl)-, -NH-, -CH2-, -S- or -C(S)-;
B is -C,-C10 alkyl, -C2-C,0 alkenyl, -heterocycle, -C3-C8 carbocycle, -aryl, -NH2,
-alkylamino, -aminodialkyl, -alkylheterocycle, -arylamido, -C(0)OH,
-C(O)O-(C,-C5 alkyl), -C(O)O-phenyl or -NZ,Z2; and
Z, and Z2 are independently -H or -C,-C,0 alkyl, which is unsubstituted or
substituted with one or more of-halo, -OH or -N(Z3)(Z4), where Z3 and Z4 are
independently, -H or -C,-C5 alkyl, which is unsubstituted or substituted with one or more of
-halo, -hydroxy or -NH2; or N, Z3 and Z4 are taken together to form an unsubstituted or
substituted heterocyclic amine; or N, Z, and Z2 are taken together to form a heterocyclic
amine.
In one embodiment, B is a heterocyclic amine.
In another embodiment, B is arylalkyl.
The invention also relates to compounds of Formula III:
and pharmaceutically acceptable salts and hydrates thereof,
wherein:
X is -CH2- or -O-;
R2 and R3 are independently -hydrogen, -halo, -alkylhalo, ^hydroxy, -O-(C,-C5
alkyl), -C,-C3 alkyl, -NO2> -NH2, -CONH2) -C(O)OH, -OC(O)-C,-C5 alkyl or -C(O)O-C,-C5
alkyl;
Rg and R, are independently -hydrogen and -A-B;
A is -SO2-, -SO2NH- or -NHCO-; and
B is -C,-C3 alkyl, -NZ,Z2, -heterocycle or -alkylamino, each unsubstituted or
substituted with one or more of-alkanol, -alkylamino, -aminoalkyl, -aminodialkyl or
-heterocycle, each unsubstituted or substituted with -C,-C)0 alkyl or -alkanol; and
Z, and Z2 are independently -hydrogen or -C,-Cg alkyl, which is unsubstituted or
substituted with one or more of-hydroxy or -NZ3Z4, where Z3 and Z4 are independently -H
or -C,-C3 alkyl, which is unsubstituted or substituted with one or more of-hydroxy or -
NH2, or N, Z3 and Z4 are taken together to a heterocyclic amine, or N, Z, and 2^ are taken
together to form a heterocyclic amine.
In one embodiment, -X- is -CH2-.
In another embodiment, -X- is -O-.
In one embodiment, R8 is hydrogen and R9 is -A-B.
In another embodiment, R* is -A-B and R9 is hydrogen.
In one embodiment, either R8 is hydrogen and R9 is -A-B, or R8 is -A-B and R9 is
hydrogen.
In one embodiment, R3, R8 and R9 are hydrogen and R2 is -A-B, wherein A is -
NHC(O)-.
In another embodiment, R2, R8 and R9 are hydrogen and R3 is -A-B, wherein A is -
NHC(O)-.
In still another embodiment R2, R3 and R8 are hydrogen and R9 is -A-B, wherein A is
-SO2- or -SO2NH-.
4.1 DEFINITIONS
"C,-C3 alkyl" refers to a straight or branched chain saturated hydrocarbon containing
1-3 carbon atoms. Examples of a C,-C3 alkyl group include, but are not limited to, methyl,
ethyl, propyl and isopropyl
"C,-C4 alkyl" refers to a straight or branched chain saturated hydrocarbon containing
1-4 carbon atoms. Examples of a C,-C4 alkyl group include, but are not limited to, methyl,
ethyl, propyl, butyl, isopropyl, isobutyl, sec-butyl and /er/-butyl.
"C|-C5 alkyl" refers to a straight or branched chain saturated hydrocarbon containing
1-4 carbon atoms. Examples of a C|-C5 alkyl group include, but are not limited to, methyl,
ethyl, propyl, butyl, pentyl, isopropyl, isobutyl, sec-butyl and /er/-butyl, isopentyl and
neopentyl.
"C,-C8 alkyl" refers to a straight or branched chain saturated hydrocarbon containing
1-8 carbon atoms. Examples of a C,-Cg alkyl group include, but are not limited to, methyl,
ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, isopropyl, isobutyl, sec-butyl and /er/-butyl,
isopentyl, neopentyl, isohexyl, isoheptyl and isooctyl.
"C,-C9 alkyl" refers to a straight or branched chain saturated hydrocarbon containing
1-9 carbon atoms. Examples of a C,-C9 alkyl group include, but are not limited to, methyl,
ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, isopropyl, isobutyl, sec-butyl and
/er/-butyl, isopentyl, neopentyl, isohexyl, isoheptyl, isooctyl and isononyl.
"C|-C)0 alkyl" refers to a straight or branched chain saturated hydrocarbon
containing 1-10 carbon atoms. Examples of a C}-C10 alkyl group include, but are not limited
to, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, isopropyl, isobutyl,
sec-butyl and /er/-butyl, isopentyl, neopentyl, isohexyl, isoheptyl, isooctyl, isononyl and
isodecyl.
"C2-C10 alkenyl" refers to a straight or branched chain unsaturated hydrocarbon
containing 2-10 carbon atoms and at least one double bond. Examples of a C2-C|0 alkenyl
group include, but are not limited to, ethylene, propylene, 1-butylene, 2-butylene,
isobutylene, sec-butylene, 1-pentene, 2-pentene, isopentene, 1-hexene, 2-hexene, 3-hexene,
isohexene, 1-heptene, 2-heptene, 3-heptene, 1-octene, 2-octene, 3-octene, 4-octene, 1-
nonene, 2-nonene, 3-nonene, 4-nonene, 1-decene, 2-decene, 3-decene, 4-decene and
decene.
"C2-C,0 alkynyl" refers to a straight or branched chain unsaturated hydrocarbon
containing 2-10 carbon atoms and at least one triple bond. Examples of a C2-C,0 alkynyl
group include, but are not limited to, acetylene, propyne, 1-butyne, 2-butyne, isobutyne,
sec-butyne, 1-pentyne, 2-pentyne, isopentyne, 1-hexyne, 2-hexyne, 3-hexyne, isohexyne, 1-
heptyne, 2-heptyne, 3-heptyne, 1-octyne, 2-octyne, 3-octyne, 4-octyne, 1-nonyne, 2-nonyne,
3-nonyne, 4-nonyne, 1-decyne, 2-decyne, 3-decyne, 4-decyne and 5-decyne.
"C,-C4 alkylene" refers to a C,-C4 alkyl group in which one of the C,-C4 alkyl
group's hydrogen atoms has been replaced with a bond. Examples of a C,-C4 alkylene
include -CH2-, -CH2 CH2-, -CH2CH2CH2- and -CH2CH2CH2CH2-.
"C,-C5 alkylene" refers to a C,-Cj alkyl group in which one of the C,-C5 alkyl
group's hydrogen atoms has been replaced with a bond. Examples of a C,-C4 alkylene
include -CH2-, -CH2 CH2-, -CH2CH2CH2- and -Examples of a C,-C4 alkylene include -CH2-,
-CH2 CH2-, -CH2CH2CH2-, ~CH2CH2CH2CH2- and -CH2CH2CH2CH2CH2-.
"Alkylhalo" refers to a C,-C} alkyl group, as defined above, wherein one or more of
the C|-C5 alkyl group's hydrogen atoms has been replaced with -F, -Cl, -Br or -I.
Representative examples of an alkylhalo group include, but are not limited to -CH2F, -CC13,
-CF3, -CH2C1, -CH2CH2Br, -CH2CH2I, -CH2CH2CH2F, -CH2CH2CH2C1,
-CH2CH2CH2CH2Br, -CH2CH2CH2CH2I, -CH2CH2CH2CH2CH2Br, -CH2CH2CH2CH2CH2I,
-CH2CH(Br)CH3 -CH2CH(C1)CH2CH3_ -CH(F)CH2CH3 and -C(CH3)2(CH2C1).
"Alkylamino" refers to a C,-C4 alkyl group, as defined above, wherein one or more
of the C,-C4 alkyl group's hydrogen atoms has been replaced with -NH2. Representative
examples of an alkylamino group include, but are not limited to -CH2NH2, -CH2CH2NH2,
-CH2CH2CH2NH2, -CH2CH2CH2CH2NH2, -CH2CH(NH2)CH3 -CH2CH(NH2)CH2CH3
-CH(NH2)CH2CH3 and -C(CH3)2(CH2NH2).
"Aminoalkyl" refers to an -NH group, the nitrogen atom of said group being
attached to a C,-C4 alkyl group, as defined above. Representative examples of an
aminoalkyl group include, but are not limited to -NHCH3, -NHCH2CH3, -NHCH2CH2CH3,
-NHCH2CH2CH2CH3 -NHCH(CH3)2 -NHCH2CH(CH3)2, -NHCH(CH3)CH2CH3 and -
NH-C(CH3)3.
"Aminodialkyl" refers to a nitrogen atom which has attached to it two C,-C4 alkyl
groups, as defined above. Representative examples of a aminodialkyl group include, but are
not limited to, -N(CH3)2, -N(CH2CH3)(CH3), -N(CH2CH3)2, -N(CH2CH2CH3)2,
-N(CH2CH2CH2CH3)2 -N(CH(CH3)2)2 -N(CH(CH3)2)(CH3), -N(CH2CH(CH3)2)2,
-NH(CH(CH3)CH2CH3)2, -N(C(CH3)3)2 and -N(C(CH3)3)(CH3).
"Aryl" refers to a phenyl or pyridyl group. Examples of an aryl group include, but
are not limited to, phenyl, N-pyridyl, 2-pyridyl, 3-pyridyl and 4-pyridyl. An aryl group can
be unsubstituted or substituted with one or more of the following groups:
-C,-C5 alkyl, halo, -alkylhalo, hydroxy, -O-C,-C5 alkyl, -NH2, -aminoalkyl, -aminodialkyl,
-COOH, -C(0)O-(C,-C5 alkyl), -OC(O)-(C,-C5 alkyl), -N-amidoalkyl, -C(0)NH2,
-carboxamidoalkyl, or -N02.
"Arylalkyl" refers to an aryl group, as defined above, wherein one of the aryl group's
hydrogen atoms has been replaced with a C,-C5 alkyl group, as defined above.
Representative examples of an arylalkyl group include, but are not limited to, 2-
methylphenyl, 3-methylphenyl, 4-methylphenyl, 2-ethylphenyl, 3-ethylphenyl, 4-
ethylphenyl, 2-propylphenyl, 3-propylphenyl, 4-propylphenyl, 2-butylphenyl, 3-burylphenyl,
4-butylphenyl, 2-pentylphenyl, 3-pentylphenyl, 4-pentylphenyl, 2-isopropylphenyl, 3-
isopropylphenyl, 4-isopropylphenyl, 2-isobutylphenyl, 3-isobutylphenyl, 4-isoburylphenyl,
2-sec-butylphenyl, 3-sec-butylphenyl, 4-sec-butylphenyl, 2-t-butylphenyl, 3-f-butylphenyl
and 4-t-butylphenyl,
"Arylamido" refers to an aryl group, as defined above, wherein one of the aryl
group's hydrogen atoms has been replaced with one or more -C(0)NH2 groups.
Representative examples of an arylamido group include 2-C(O)NH2-phenyl, 3-C(O)NH2-
phenyl, 4-C(O)NH2-phenyl, 2-C(O)NH2-pyridyl, 3-C(O)NH2-pyridyl and 4-C(0)NH2-
pyridyl,
"Alkylheterocycle" refers to a C,-C5 alkyl group, as defined above, wherein one of
the C,-C5 alkyl group's hydrogen atoms has been replaced with a heterocycle.
Representative examples of an alkylheterocycle group include, but are not limited to,
-CH2CH2-morpholine, -CH2CH2-piperidine, -CH2CH2CH2-morpholine and
-CH2CH2CH2-imidazole.
"Alkylamido" refers to a C,-C5 alkyl group, as defined above, wherein one of the C,-
C5 alkyl group's hydrogen atoms has been replaced with a -C(O)NH2 group. Representative
examples of an alkylamido group include, but are not limited to, -CH2C(O)NH2,
-CH2CH2C(O)NH2, -CH2CH2CH2C(0)NH2, -CH2CH2CH2CH2C(O)NH2,
-CH2CH2CH2CH2CH2C(O)NH2,-CH2CH(C(O)NH2)CH3 -CH2CH(C(O)NH2)CH2CH3
-CH(C(O)NH2)CH2CH3 and -C(CH3)2CH2C(O)NH2.
"Alkanol" refers to a C,-C5 alkyl group, as defined above, wherein one of the C,-C5
alkyl group's hydrogen atoms has been replaced with a hydroxyl group. Representative
examples of an alkanol group include, but are not limited to, -CH2OH, -CH2CH2OH,
-CH2CH2CH2OH, -CH2CH2CH2CH2OH, -CH2CH2CH2CH2CH2OH, -CH2CH(OH)CH3
-CH2CH(OH)CH2CH3 -CH(OH)CH2CH3 and -C(CH3)2CH2OH.
"Alkylcarboxy" refers to a C,-CS alkyl group, as defined above, wherein one of the
C(-C5 alkyl group's hydrogen atoms has been replaced with a -COOH group. Representative
examples of an alkylcarboxy group include, but are not limited to, -CH2COOH,
-CH2CH2COOH, -CH2CH2CH2COOH, -CH2CH2CH2CH2COOH, -CH2CH(COOH)CH3_
-CH2CH2CH2CH2CH2COOH, -CH2CH(COOH)CH2CH3 -CH(COOH)CH2CH3 and
-C(CH3)2CH2COOH.
"N-amidoalkyl" refers to a -NHC(O)- group in which the carbonyl carbon atom of
said group is attached to a C|-C5 alkyl group, as defined above. Representative examples of
a N-amidoalkyl group include, but are not limited to, -NHC(O)CH3, -NHC(O)CH2CH3,
-NHC(O)CH2CH2CH3> -NHC(O)CH2CH2CH2CH3 -NHC(O)CH2CH2CH2CH2CH3
-NHC(O)CH(CH3)2 -NHC(O)CH2CH(CH3)2, -NHC(O)CH(CH3)CH2CH3, -NHC(O)-
C(CH3)3 and -NHC(0)CH2C(CH3)3.
"Carboxamidoalkyl" refers to a -C(O)NH- group in which the nitrogen atom of said
group is attached to a C,-C5 alkyl group, as defined above. Representative examples of a
carboxamidoalkyl group include, but are not limited to, -C(O)NHCH3, -C(0)NHCH2CH3,
-C(0)NHCH2CH2CH3, -C(O)NHCH2CH2CH2CH3> -C(O)NHCH2CH2CH2CH2CH3
-C(0)NHCH(CH3)2-C(O)NHCH2CH(CH3)2, -C(O)NHCH(CH3)CH2CH3, -C(O)NHC(
CH3)3 and -C(O)NHCH2C(CH3)3.
An "Arylene" group is a phenyl group in which one of the phenyl group's hydrogen
atoms has been replaced with a bond. An arylene group may be in an ortho, meta, or para
configuration and may be unsubstituted or independently substituted with one or more of
the following groups: -C|-C5 alkyl, halo, -alkylhalo, hydroxy, -O-C,-C5 alkyl,
-NH2, -aminoalkyl, -aminodialkyl, -COOH, -C(O)O-(C,-C5 alkyl), -OC(O)-(C,-C5 alkyl),
N-amidoalkyl, -C(O)NH2, -carboxamidoalkyl or -NO2.
A "C3-C8 Carbocycle" is a non-aromatic, saturated hydrocarbon ring containing 3-8
carbon atoms. Representative examples of a C3-Cg carbocycle include, but are not limited
to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl and cyclooctyl. A C3-C8
carbocycle may be unsubstituted or independently substituted with one or more of the
following groups: -C,-C5 alkyl, halo, -alkylhalo, hydroxy, -O-C,-C5 alkyl, -NH2,
-aminoalkyl, -aminodialkyl, -COOH, -C(O)O-(C,-C5 alkyl), -OC(O)-(C,-C3 alkyl),
-N-amidoalkyl, -C(O)NH2, -carboxyamidoalkyl or -NO2.
"Heterocycle" refers to a 5- to 10-membered aromatic or non-aromatic carbocycle in
which 1-4 of the ring carbon atoms have been independently replaced with a N, O or S
atom. Representative examples of a heterocycle group include, but are not limited to,
piperidinyl, piperazinyl, morpholinyl, pyrrolyl, oxazinyl, thiazinyl, diazinyl, triazinyl,
tetrazinyl, imidazolyl, benzimidazolyl, tetrazolyl, indolyl, isoquinolinyl, quinolinyl,
quinazolinyl, pyrrolidinyl, purinyl, isoxazolyl, benzisoxazolyl, furanyl, furazanyl, pyridinyl,
oxazolyl, benzoxazolyl, thiazolyl, benzthiazolyl, thiophenyl, pyrazolyl, triazolyl,
benzodiazolyl, benzotriazolyl, pyrimidinyl, isoindolyl and indazolyl. A heterocycle group
may be unsubstituted or substituted with one or more of the following groups: -C,-C3 alkyl,
halo, -alkylhalo, hydroxy, -O-CrC5 alkyl, -NH2,
-aminoalkyl, -aminodialkyl, -COOH, -C(O)O-(C,-C5 alkyl), -OC(O)-(C,-C5 alkyl),
-N-amidoalkyl, -C(0)NH2, -carboxamidoalkyl or -N02.
A "Heterocyclic amine" is a heterocycle, defined above, having 1-4 ring nitrogen atoms. Representative examples of heterocyclic amines include, but are not limited to, piperidinyl, piperazinyl, pyrrolyl, oxazinyl, thiazinyl, diazinyl, triazinyl, tetrazinyl, imidazolyl, benzimidazolyl, tetrazolyl, indolyl, isoquinolinyl, quinolinyl, quinazolinyl, pyrrolidinyl, purinyl, isoxazolyl, benzisoxazolyl, pyridinyl, oxazolyl, benzoxazolyl, thiazolyl, benzthiazolyl, pyrazolyl, triazolyl, benzodiazolyl, benzotriazolyl, pyrimidinyl, isoindolyl, indazolyl and morpholinyl; each of which may be unsubstituted or substituted with one or more of -N-(C1-C5 alkyl). -C(0)-((C1-C3 alkyl), -N-C(0)(C1-C4 alkyl), -O-(C1-C5 alkyl), -halo, -alkylhalo, -alkanol, -alkylamino, -hydroxy, -N02, -NH2, -aminoalkyl, -aminodialkyl, -heterocyclic amine, -C1-C10 alkyl, -C2-C10 alkenyl, -C2-Ct0 alkynyl, -aryl, -benzyl, -alkylamido, -alkylcarboxy, -COOH, - (C1-C5 alkylene-OC(0)-C1-C5 alkyl, -C1-C5 alkylene-C(0)0-C1-C5 alkyl, or a heterocycle or C3-C8 carbocycle which may be unsubstituted or substituted with one or more of-C1-C10 alkyl, -0-(C1-Cs alkyl), -halo, -alkylhalo, -alkanol, -alkylamino, -hydroxy, -NOz or -NH2.
"Halo" is -F, -CI, -Br or -I.
A "subject" is a mamma], e.g., a human, mouse, rat, guinea pig, dog, cat, horse, cow, pig, or non-human primate.
The invention also includes pharmaceutical compositions comprising an Indeno[l,2-c]isoquinoline Compound and a phannaceutically acceptable carrier. The invention includes an Indeno[l,2-c]isoquinoline Compound when provided as a pharmaceutically acceptable prodrug, hydrated salt, such as a phannaceutically acceptable salt, or mixtures thereof.
Representative "phannaceutically acceptable salts" include, e.g., water-soluble and water-insoluble salts, such as the acetate, amsonate (4,4-diaminostilbene-2,2 -disulfonate), benzenesulfonate, benzonate, bicarbonate, bisulfate, bitartrate, borate, bromide, butyrate, calcium edetate, camsylate, carbonate, chloride, citrate,clavulanate dihydrochloride, edetate, edisylate, estolate, esylatefumarate, gluceptate, gluconate, glutamate, glycoilylarsanilate, hexafluorophosphate, hexylresorcinate, hydrabamine, hydrobromide, hydrochloride, hydroxynaphthoate, iodide, isothionate, lactate, lactobionate, laurate, malate, maleate, mandelate, mesylate, methylbromide, methylnitrate, methylsulfate, mucate, napsylate, nitrate, N-methylglucamine ammonium salt, 3-hydroxy-2-naphthoate, oleate, oxalate, palmitate, pamoate (1,1- methene- bis-2-hydroxy-3-naphthoate, einbonate), pantothenate, phosphate/diphosphate, picrate, polygalacturonate, propionate,

p-toluenesulfonate, salicylate, stearate, subacetate, succinate, sulfate, sulfosaliculate, sulfamate tartrate, tartrate, teoclate, tosylate, triethiodide, and valerate salts. An "effective amount" when used in connection an Indeno[l,2-c]isoquinoline Compound is an amount effective for treating or preventing an inflammatory disease or a reperfusion disease.
The following abbreviations are used herein and have the indicated definitions: AcOH is acetic acid, CEP is Cecal Ligation and Puncture, DMEM is Dulbecco's Modified Eagle Medium, DMF is N, N-dimethylformamide, DMSO is dimethylsulfoxide, EtOAc is ethyl acetate, EtOH is ethanol, HEPES is 4-(2-hydroxyethyl)-l-piperazineethanesulfonic acid, LPS is lipopolysaccharide, MeOH is methanol, MS is mass spectrometry, NMR is nuclear magnetic resonance, PBS is phosphate-buffered saline (pH 7.4), PARS is poly(ADP-ribose)synthetase, Py is pyridine, SDS is dodecyl sulfate (sodium salt), STZ is streptozotocin, TCA is tricholoroacetic acid, TFA is trifluoroacetic acid, TLC is thin-layer chromatography, TNF is tumor necrosis factor and TRIS is Tris(hydroxymethyl)aminomethane.
Methods for using Indeno[l ,2-c]isoquinoline Compounds
The invention also includes methods for inhibiting PARS in a cell. PARS, which is also known as poly(ADP-ribose)synthetase, PARP ((poIy(ADP-ribose) polymerase, EC 2.4.99) and ADP-ribosyltransferase (ADPRT, EC 2.4.2.30), is a nuclear enzyme that catalyzes a transfer of the ADP ribose moiety of NAD+ to an acceptor protein.
In one embodiment the method comprises contacting a cell with an Indeno[l,2-cjisoquinoline Compound in an amount sufficient to inhibit PARS in the cell. In general, any cell having, or capable of having, PARS activity or capable of expressing PARS can be used. The cell can be provided in any form. For example, the cell can be provided in vitro, ex vivo, or in vivo. PARS activity can be measured using any method known in the art, e.g., methods as described in Banasik et al., J. Biol. Chem. 267:1569-75 (1991). Illustrative examples of cells capable of expressing PARS include, but are not limited to muscle, bone, gum, nerve, brain, liver, kidney, pancreas, lung, heart, bladder, stomach, colon, rectal, small intestine, skin, esophageal, eye, larynx, uterine, ovarian, prostate, tendon, bone marrow, blood, lymph, testicular, vaginal and neoplastic cells.
Also provided in the invention is a method for inhibiting, preventing, or treating inflammation or an inflammatory disease in a subject. The inflammation can be associated

with an inflammatory disease. Inflammatory diseases can arise where there is an
inflammation of the body tissue. These include local inflammatory responses and systemic
inflammation. Examples of such diseases include: organ transplant rejection; reoxygenation
injury resulting from organ transplantation (see Grupp et al. J. Mol. Cell Cardiol. 31:297-
303 (1999)) including, but not limited to, transplantation of the following organs: heart,
lung, liver and kidney; chronic inflammatory diseases of the joints, including arthritis,
rheumatoid arthritis, osteoarthritis and bone diseases associated with increased bone
resorption; inflammatory bowel diseases such as ileitis, ulcerative colitis, Barrett's
syndrome, and Crohn's disease; inflammatory lung diseases such as asthma, adult
respiratory distress syndrome, and chronic obstructive airway disease; inflammatory
diseases of the eye including corneal dystrophy, trachoma, onchocerciasis, uveitis,
sympathetic ophthalmitis and endophthalmitis; chronic inflammatory diseases of the gum,
including gingivitis and periodontitis; tuberculosis; leprosy; inflammatory diseases of the
kidney including uremic complications, glomerulonephritis and nephrosis; inflammatory
diseases of the skin including sclerodermatitis, psoriasis and eczema; inflammatory diseases
of the central nervous system, including chronic demyelinating diseases of the nervous
system, multiple sclerosis, AIDS-related neurodegeneration and Alzheimer s disease,
infectious meningitis, encephalomyelitis, Parkinson's disease, Huntingdon's disease,
amyotrophic lateral sclerosis and viral or autoinimune encephalitis; autoimmune diseases
including Type I and Type II diabetes mellitus; diabetic complications, including, but not
limited to, diabetic cataract, glaucoma, retinopathy, nephropathy, such as microaluminuria
and progressive diabetic nephropathy, polyneuropathy, gangrene of the feet, atherosclerotic
coronary arterial disease, peripheral arterial disease, nonketotic hyperglycemichyperosmolar
coma, mononeuropathies, autonomic neuropathy, foot ulcers, joint problems,
and a skin or mucous membrane complication, such as an infection, a shin spot, a candidal
infection or necrobiosis lipoidica diabeticorum; immune-complex vasculitis, systemic lupus
erythematosus (SLE); inflammatory diseases of the heart such as cardiomyopathy, ischemic
heart disease hypercholesterolemia, and atherosclerosis; as well as various other diseases
that can have significant inflammatory components, including preeclampsia; chronic liver
failure, brain and spinal cord trauma, and cancer. The inflammatory disease can also be a
systemic inflammation of the body, exemplified by gram-positive or gram negative shock,
hemorrhagic or anaphylactic shock, or shock induced by cancer chemotherapy in response
io pro-inflammatory cytokines, e.g., shock associated with pro-inflammatory cytokines.
Such shock can be induced, e.g., by a chemotherapeutic agent that is adminstered as a
treatment for cancer.
In one embodiment, a reoxygenation injury resulting from organ transplantation
occurs during the organ transplantation.
The invention also includes methods for treating, preventing, or otherwise inhibiting
reperfusion disease in a subject in need of treatment, prevention, or inhibition thereof. The
method comprises administering an Indeno[l,2-c]isoquinoline Compound in an amount
sufficient to treat, prevent or inhibit reperfusion disease in the subject. Reperfusion refers to
the process whereby blood flow in the blood vessels is resumed following ischemia, such as
occurs following constriction or obstruction of the vessel. Reperfusion disease can result
following a naturally occurring episode, such as a myocardial infarction, stroke, or during a
surgical procedure where blood flow in vessels is intentionally or unintentionally blocked.
In some embodiments, the subject is administered an effective amount of an
Indeno[l ,2-c]isoquinoline Compound.
The invention also includes pharmaceutical compositions useful for treating or
preventing an inflammatory disease or a reperfusion disease, or for inhibiting PARS
activity, or more than one of these activities. The compositions can be suitable for internal
use and comprise an effective amount of an Indeno[l,2-c]isoquinoline Compound and a
pharmaceutically acceptable carrier. The Indeno[l,2-c]isoquinoline Compounds are
especially useful in that they demonstrate very low peripheral toxicity or, no peripheral
toxicity.
The Indeno[l,2-c]isoquinoline Compounds can be administered in amounts that are
sufficient to treat or prevent an inflammatory disease or a reperfusion disease and/or prevent
the development thereof in subjects.
Administration of the Indeno[l,2-c]isoquinoline Compounds can be accomplished
via any mode of administration for therapeutic agents. These modes include systemic or
local administration such as oral, nasal, parenteral, transdermal, subcutaneous, vaginal,
buccal, rectal or topical administration modes.
Depending on the intended mode of administration, the compositions can be in
solid, semi-solid or liquid dosage form, such as, for example, injectables, tablets,
suppositories, pills, time-release capsules, elixirs, tinctures, emulsions, syrups, powders,
liquids, suspensions, or thelike, preferably in unit dosages and consistent with conventional
pharmaceutical practices. Likewise, they can also be administered in intravenous (both
bolus and infusion), intraperitoneal, subcutaneous or intramuscular form, all using forms
well known to those skilled in the pharmaceutical arts.
Illustrative pharmaceutical compositions are tablets and gelatin capsules comprising
an Indeno[l,2-c]isoquinoline Compound and a pharmaceutically acceptable carrier, such as
a) a diluent, e.g., lactose, dextrose, sucrose, mannitol, sorbitol, cellulose, sodium, saccharin,
glucose and/or glycine; b) a lubricant, e.g., silica, talcum, stearic acid, its magnesium or
calcium salt, sodium oleate, sodium stearate, magnesium stearate, sodium benzoate, sodium
acetate, sodium chloride and/or polyethylene glycol; for tablets also c) a binder, e.g.,
magnesium aluminum silicate, starch paste, gelatin, tragacanth, methylcellulose, sodium
carboxymethylcellulose, magnesium carbonate, natural sugars such as glucose or
beta-lactose, corn sweeteners, natural and synthetic gums such as acacia, tragacanth or
sodium alginate, waxes and/or polyvinylpyrrolidone; if desired d) a disintegrant, e.g.,
starches, agar, methyl cellulose, bentonite, xanthan gum, algiic acid or its sodium salt, or
effervescent mixtures; and/or e) absorbent, colorant, flavorant and sweetener.
Liquid, particularly injectable, compositions can, for example, be prepared by
dissolution, dispersion, etc. For example, the Indeno[l,2-c]isoquinoline Compound is
dissolved in or mixed with a pharmaceutically acceptable solvent such as, for example,
water, saline, aqueous dextrose, glycerol, ethanol, and the like, to thereby form an injectable
isotonic solution or suspension.
The Indeno[l,2-c]isoquinoline Compounds can be also formulated as a suppository
that can be prepared from fatty emulsions or suspensions; using polyalkylene glycols such
as propylene glycol, as the carrier.
The Indeno[l,2-c]isoquinoline Compounds can also be administered in the form of
liposome delivery systems, such as small unilamellar vesicles, large unilamellar vesicles
and multilamellar vesicles. Liposomes can be formed from a variety of phospholipids,
containing cholesterol, stearylamine or phosphatidylcholines. In some embodiments, a film
of lipid components is hydrated with an aqueous solution of drug to a form lipid layer
encapsulating the drug, as described in United States Patent No. 5,262,564.
Indeno[l,2-c]isoquinoline Compounds can also be delivered by the use of
monoclonal antibodies as individual carriers to which the Indeno[l,2-c]isoquinoline
Compound molecules are coupled. The Indeno[l,2-c]isoquinoline Compounds can also be
coupled with soluble polymers as targetable drug carriers. Such polymers can include
polyvinylpyrrolidone, pyran copolymer, polyhydroxypropylmethacrylamide-phenol,
polyhydroxyethylaspanamidephenol, or polyethyleneoxidepolylysine substituted with
palmitoyl residues. Furthermore, the Indeno[l,2-c]isoquinoline Compounds can be coupled
to a class of biodegradable polymers useful in achieving controlled release of a drug, for
example, polylactic acid, polyepsilon caprolactone, polyhydroxy butyric acid,
polyorthoesters, polyacetals, polydihydropyrans, polycyanoacrylates and cross-linked or
amphipathic block copolymers of hydrogels.
Parental injectable administration is generally used for subcutaneous, intramuscular
or intravenous injections and infusions. Injectables can be prepared in conventional forms,
either as liquid solutions or suspensions or solid forms suitable for dissolving in liquid prior
to injection.
One embodiment for parenteral administration employs the implantation of a
slow-release or sustained-released system, according to U.S. Pat. No. 3,710,795,
incorporated herein by reference.
The compositions can be sterilized or contain non-toxic amounts of adjuvants, such
as preserving, stabilizing, wetting or emulsifying agents, solution promoters, salts for
regulating the osmotic pressure pH buffering agents, and other substances, including, but
not limited to, sodium acetate or triethanolamine oleate. In addition, they can also contain
other therapeutically valuable substances.
Compositions can be prepared according to conventional mixing, granulating or
coating methods, respectively, and the present pharmaceutical compositions can contain
from about 0.1% to about 99%, preferably from about 1% to about 70% of the Indeno[l,2-
cjisoquinoline Compound by weight or volume.
The dosage regimen utilizing the Indeno[l,2-c]isoquinoline Compound is selected
in accordance with a variety of factors including type, species, age, weight, sex and medical
condition of the patient; the severity of the condition to be treated; the route of
administration; the renal or hepatic function of the patient; and the particular Indeno[l,2-
c]isoquinoline Compound employed. An physician or veterinarian of ordinary skill in the art
can readily determine and prescribe the effective amount of the drug required to prevent,
counter or arrest the progress of the condition.
Effective dosage amounts of the present invention, when used for the indicated
effects, range from about 0.05 to about 1000 mg of Indeno[l,2-c]isoquinoline Compound
per day. The compositions can contain about 0.5, 1.0, 2.5, 5.0, 10.0, 15.0, 25.0, 50.0, 100.0,
250.0, 500.0 or 1000.0 mg of Indeno[l,2-c]isoquinoline Compound. In one embodiment,
the compositions are in the form of a tablet that can be scored. Effective plasma levels of
the Indeno[l,2-c]isoquinoline Compounds can range from about 0.002 mg to about 50 mg
per kg of body weight per day.
Indeno[l,2-c]isoquinoline Compounds can be administered in a single daily dose,
or the total daily dosage may be administered in divided doses of two, three or four times
daily. Furthermore, Indeno[l,2-c]isoquinoline Compounds can be administered in
intranasal form via topical use of suitable intranasal vehicles, or via transdermal routes,
using those forms of transdermal skin patches well known to those of ordinary skill in that
art. To be administered in the form of a transdermal delivery system, the dosage
administration can be continuous rather than intermittent throughout the dosage regimen.
Other illustrative topical preparations include creams, ointments, lotions, aerosol sprays and
gels, wherein the concentration of Indeno[l,2-c]isoquinoline Compound ranges from about
0.1% to about 15%, w/w or w/v.
Methods for making Indeno[l,2-c]isoquinoline Compounds
Examples of synthetic pathways useful for making lndeno[l,2-c]isoquinoline
Compounds are set forth in the Examples, below and generalized in Schemes 1 and 2.
(Figure removed)
1.POCI3145°C ^ 2. KNO3,H2SO4
N 3. HCI (50%). heat
O O
11
7. pyridine HBr perbromide,
AcOH-water, then dil HCI, heat
4. Ammonium formate,
MeOH, Pd-C,100°C
O
15
5. CICOCH2CI, EtOAc.
sat. NaHCO3
6. Me2NH, DMSO, rt
Scheme 2
5,6-dihydro-5,l 1-diketo-l l//-indeno[l,2-c]isoquinoline was prepared by reacting
compound 1 (Aldrich Chemical, Milwaukee, WI) with ammonia in methanol.
(±) 1 l-hydroxy-5,6-dihydro-5-oxo-l lH-indeno[l,2-c]isoquinoline (3a) was prepared
by reacting 2 with NaBH4 in ethanol.
11-hydroxy-l l-methyl-5,6-dihydro-5-oxo-llH-indeno[l,2-c]isoquinoline (3b)
was prepared by reacting 2 with MeMgl.
(±) 11 -hydroxy-1 l-(m-methoxyphenyl)-5,6-dihydro-5-oxo-l lH-indeno[l,2-c]
isoquinoline (3c) was prepared from 2 using w-MeO-C6H4MgI.
(±) U-A^-dimethylamino-S^-dihydro-S-oxo-l IH-indeno [1,2-cjisoquinoline (5a)
was prepared from 3a using chloroacetylchloride followed by reacting with dimethylamine.
Similarly prepared are: (±) 11-N, N-diethylamino-5,6-dihydro-5-oxo-l IH-indeno
[l,2-c]isoquinoline (5b), (±) 1 l-7^-(piperidino-l-yl)-5,6-dihydro-5-oxo-l lH-indeno[l,2-c]
isoquinoline (5d), (±) ll-//-(4-methylpiperazino-l-yl)-5,6-dihydro-5-oxo-
UH-indeno[l,2-c] isoquinoline (5c), (±) 1 l-/*/-(morpholino-4-yl)-5,6-dihydro-5-oxo-
HH-indeno[l,2-c]isoquinoline(5e). (+) 11-A^morpholimMyl)-
5,6-dihydro-5-oxo-l lH-indeno[l ,2-c]isoquinoline (5e) was also prepared from (±)
1 l-bromo-5,6-dihydro-5-oxo-l lH-indeno[l, 2-c]isoquinoline (4b).
5,6-Dihydro-5-oxo-1 l//-indeno-[l,2-c]isoquinoline (6)is prepared by reduction of
5,6-dihydro-5,l 1-diketo-l lH-indeno[l,2-c]isoquinoline (2) or (+) 1 l-hydroxy-5,6-dihydro-
5-oxo-l lH-indeno[l,2-c]isoquinoline (3a) using CF3COOH/triethylsilane.
9-Chlorosulphonyl-5,6-dihydro-5-oxo-l lH-indeno-[l,2-c] isoquinoline (7) was prepared by
chlorosulfonation of 5,6-dihydro-5-oxo-l IH-indeno- [l,2-c]isoquinoline (6).
9-[Ar-(4-methylpiperazine-l-yl)sulphonyl]-5,6-dihydro-5-oxo-llH-indeno-[l,2-c]
isoquinoline (8a) was prepared from 9-chlorosulphonyl-5,6-dihydro-5-oxo-llH-indeno-
[l,2-c]isoquinoline (7), and N-methylpiperazine. Similarly prepared are: 9-[^V-(4-
carbomethoxymethylenepiperazino-l-yl)sulphonyl]-5,6-dihydro-5-oxo-HH-indeno-
[1,2-c]isoquinoline (8b), 9-[A^-4-(2-hydroxyethylpiperazino-l-yl)-sulphonyl]-5,6-dihydro-5-
oxo-1 lH-indeno-[l,2-c]isoquinoline (8c), 9-[//-(imidazolo-l-yl)sulphonyl]-5,6-dihydro-5-
oxo-1 lH-indeno[l,2-c]isoquinoline (8d), 9-[A'r-(2-hydroxyprolinyl)sulphonyl]-5,6-
dihydro-5-oxo-l lH-indeno[l,2-c]isoquinoline (8e), 9-[A^-morpholinesulphonyl]-5,6-
dihydro-5-oxo-l lH-indeno-[l,2-c]isoquinoline (8f), 9-[//-(2-[Ar,A^-dimethylamino]ethyl)-
aminosulphonyl]-5,6-dihydro-5-oxo-11 H-indeno[ 1,2-c]isoquinoline (8g), 9-[A^-(2-
[piperidino-l-yl]ethyl)-aminosulphonyl]-5,6-dihydro-5-oxo-llH-indeno[l,2-c]isoquinoline
(8h), 9-[A^-(2-(pyridino-2-yl)-ethyl)-aminosulphonyl]-5,6-dihydro-5-oxo-llH-indeno[l,2-
c]isoquinoline(8i), 9-[A^-(2-[morpholino-4-yl]ethyl)-aminosulphonyl]-5,6-dihydro-5-oxo-
1 lH-indeno[l,2-c]isoquinoline (8j), 9-[N-(2-[N-methyltetrahydropyrrolidino-l-yl]ethyl)
aminosulphonyl]-5,6-dihydro-5-oxo-l lH-indeno-[l,2-c]isoquinoline (8k), 9-[Ar-(3-
[morpholino-4-yl]propyl)-aminosulphonyl]-5,6-dihydro-5-oxo-l lH-indeno-[l,2-
c]isoquinoline (81), 9-[//-(3-[tetrahydropyrrolodino-l -yl]propyl)aminosulphonyl]-5,6-
dihydro-5-oxo- HH-indeno-[l,2-c] isoquinoline (8m), 9-[Ar-(3-[imidazolo-l-yl]propyl)-
aminosulphonyl]-5,6-dihydro-5-oxo-l lH-indeno-[l,2-c]isoquinoline (8n), 9-[JV-[3-(4-
methylpiperazino-l-yl]propyl)-aminosulphonyl]-5,6-dihydro-5-oxo-llH-indeno-[l,2-
c]isoquinoline(8o),9-[A^A^-£//-(2-[A^A^-diethylamino]ethyl)-aminosulphonyl]-5,6-dihydro-5-
oxo-1 lH-indeno-[l,2-c]isoquinoline (8p), 9-[A^,A/-i//-(2-[A^Ar-dimethylamino]ethyl)-
aminosulphonyl]-5,6-dihydro-5-oxo-l lH-indeno-[l,2-c] isoquinoline (8q), and Q-
(2-[MAdihydroxyethylamino]ethyl)-aminosulphonyl]-5,6-dihydro-5-oxo-llH-indeno-[l,2-
c]isoquinoline (8r).
The amide derivatives 3-morpholin-4-yl-./V-(5-oxo-5,l l-dihydro-6//-indeno[l,2-
c]isoquinolin-3-yl)-acetamide (lOa), 3-dimethylamino-JV-(5-oxo-5,l l-dihydro-6/findeno[
l,2-c]isoquinolin-3-yl)-acetamide (lOb) and 2-dimethylamino-Ar-(5-oxo-5,lldihydro-
6//-indeno[l,2-c]isoquinolin-2-yl)-acetamide (14) were prepared from 5,6-dihydro-
5-oxo-l lH-indeno[l,2-c]isoquinoline (6) and 5-chloro-l lH-indeno[l,2-c]isoquinoline (11)
using nitration, then reduction, and followed by amination of the chloroacetamide
intermediate. 2-bromo-5,6-dihydro-5-oxo-l lH-indeno[l,2-c]isoquinoline (15) was prepared
by bromination of chloroamidate 11.
The invention is further described in the following examples, which do not limit the
scope of the invention described in the claims. The following examples illustrate the
synthesis of illustrative Indeno[l,2-c]isoquinoline Compounds of the invention, and
demonstrates their usefulness for treating or preventing an inflammatory disease or
reperfusion disease.
5. EXAMPLES
Example 1: Synthesis of Illustrative Indeno[l,2-c]isoquinoline Compounds
a) General Methods
Proton NMR spectra were obtained using a Varian 300 MHz spectrophotometer and
chemical shift values (8) are reported in parts per million (ppm). TLC was performed using
TLC plates precoated with silica gel 60 F-254, and preparative TLC was performed using
precoated Whatman 60A TLC plates. All intermediates and final compounds were
characterized on the basis of 'H NMR and MS data.
Synthesis of 5,6-dihydro-5,ll-diketo-ll//-indeno [l,2-c)isoquinoline (2):
A stirred suspension of 1 (55 g, 0.22 mol) in NH3/MeOH (7.0N, 700 mL) was
refluxed 15 for 24 h. The reaction mixture was then allowed to cool to room temperature
and was filtered and washed thoroughly with MeOH to provide 46 g of the orange colored
above-titled product in 84% yield. 'H NMR (DMSO-D6): 8 7.48-7.61 (m, 4H), 7.80-7.88
(m, IH), 7.86 (d, J= 8.7 Hz, IH), 8.22 (d, J= 8.4 Hz, IH), 8.44 (d, J= 7.5 Hz, IH), 13.05 (s,
IH); I3C NMR (DMSO-D6): 6 106.33,121.63, 122.94, 123.27, 124.80,128.45,132.17,
133.60, 134.03,134.68,134.68, 134.81, 137.09, 156.41, 163.76, 190.57; MS (ES'): m/z
246.2 (M-l); Anal. Calcd for C16H9NO2: C, 77.72; H, 3.67; N, 5.67; Found: C, 77.54; H,
3.69, N, 5.69.
c) Synthesis of (±) ll-hydroxy-5,6-dihydro-5-oxo-ll//-indeno[l,2-c] isoquinoline (3a):
To a stirred suspension of 2 (2.5 g, 0.01 mol) in EtOH (25 mL) was added NaBH4
(3.75 g, 0.1 mol) at room temperature in small portions over 30 min. The reaction mixture
was stirred for an additional 2 h and then cooled to 0°C where it was triturated with dilute
HC1 (10% soln.). The resulting solid precipitated was filtered and washed with water and
MeOH to provide 3a (2.326 g, 92%). 'H NMR (DMSO-D6): 6 5.58 (d, J= 8.1 Hz, IH), 5.78
(d, J= 8.7 Hz, IH), 7.33 -7.89 (m, 6H), 7.95 (d, J= 7.8 Hz, 1W, 8.22 (d,J= 7.8 Hz, IH),
12.29 (s, IH); UC NMR (DMSO-D6): 6 77.44, 118.81,120.15, 124.28, 125.04,125.67,
126.34, 128.46, 128.64, 128.95, 133.27, 135.62, 136.12,139.93, 148.55,163.69.; MS (ES+):
m/z 250.1 (M+l); Anal. Calcd for C16H,,NO2: C, 77.10; H, 4.45; N, 5.62. Found: C, 77.01;
H, 4.57, N, 5.59.
Similarly, by reacting 2 with MeMgl and m-MeO-C6H4MgBr, respectively,
compounds (±) 11-hydroxy-l l-methyl-5,6-dihydro-5-oxo-l l//-indeno[l,2-c]isoquinoline
(3b) and (±) 11-hydroxy-l l-(m-methoxyphenyl)-5,6-dihydros-5-oxo-l l//-indeno[l,2-
cjisoquinoline (3c) were prepared.
d) Synthesis of 11-substituted 5,6-dihydro-5-oxo-ll//-indeno[l,2-c)isoquinolines
To a stirred suspension of 3a (0.5 g, 0.002 mol) in pyridine (10 mL) was added
chloroacetyl chloride (0.81 g, 0.006 mol) at 0°C. The reaction mixture was allowed to warm
to room temperature and stir for 24 h. The reaction mixture was then poured on ice and
extracted with EtOAc. The organic layer was separated, dried and concentrated to provide
crude compound 4a, which was treated further with dimethylamine and stirred at room
temperature for 24 h. The reaction mixture was poured on ice, and treated with 10% Hcl.
The resulting mixture was then basified using saturated aqueous NaHCO3 and the resulting
solid was filtered to provide the desired product 5a. 'H NMR (DMSO-D6): 6 2.31 (s, 6H),
5.00 (s, 1H), 7.28-7.45 (m, 3H), 7.68 - 7.73 (m, 2H), 7.95 (d, J= 6.9 Hz, 1H), 8.10 (d, J=
7.8 Hz, 1H),8.21 (d, .7=8.1 Hz, 1H), 12.26 (s, 1H); 13C NMR (DMSO-D6): 668.09,
116.28, 120.52, 124.58,125.74, 126.27, 126.34, 127.68, 128.64, 133.02, 136.27, 144.45,
163.80; MS (ES+): m/z 277.2 (M+l).
The following compounds were also prepared by reacting 4a as above with
diethylamine, piperidine, N-methylpiperidine and morpholine, respectively:
(±) 11 -diethylamino-5,6-dihydro-5-oxo-ll//-indeno[l,2-c]isoquinoline (5b)
(±) 1 l-piperidino-5,6-dihydro-5-oxo-l l//-indeno[l,2-c]isoquinoline (5c)
(±) 1 l-(m-methylpiperazino)-5,6-dihydro-5-oxo-l l//-indeno[l,2-c]isoquinoline (5d)
(±) 1 l-morpholino-5,6-dihydro-5-oxo-l l//-indeno[l,2-c]isoquinoline (5e).
e) Synthesis of (±) ll-morpholino-5,6-dihydro-5-oxo-HH-indeno|l,2-c]isoquinolines
(5e) from 4b
(Figure removed)
To a stirred suspension of 3a (0.6 g, 2.4 mmol) in trifluoroacetic acid (5 mL) was
added phosphorus tribromide (1.0 M soln. in CH2C12, 3 mL) at room temperature, and the
reaction mixture was stirred for 8 h. The reaction mixture was poured on ice and the
resulting solid was filtered to provide bromo compound 4b (0.61 gm, 76%). 'H NMR
(DMSO-D6): 8 7.35-7.50 (m, 3H), 7.61 (d, J= 6.6 Hz, IH), 7.73 -7.82 (m, 211), 7.94 (d,
6.6 Hz, IH), 8.23 (d, J= 7.8 Hz, 1W, 12.41 (s, IH); I3C NMR (DMSO-D6): 6 52.06, 79.35,
114.43, 120.56, 123.58, 125.27, 125.50, 126.68,128.55, 128.86,129.66,133.73,135.91,
136.61,141.39,143.95,163.74.
Compound 4b (0.5 g) was suspended in MeOH (10 mL) and treated with excess
morpholine (-10 eq.) at room temperature and stirred at 60°C for 3 h. The reaction mixture
was poured on ice, and diluted with ethyl acetate (40 mL). The organic layer was separated
and extracted in dil. HC1 (10% soln.), the aqueous layer was then basified with sat. aq.
NaHCO3 and the resulting solid precipitated was filtered and dried to provide 5e (0.46 g,
90%). 'H NMR (DMSO,D6): 8 2.56 (m, 4H), 3.49 (m, 4H), 5.04 (s, IH), 7.31-7.45 (m, 3H),
7.65 -7.76 (m, 2H), 7.96 (d, >= 7.2 Hz, 1H), 8.20-8.24 (m, 2H), 12.29 (s, 1H); 13C NMR
(DMSO-D6): 6 49.36, 67.62: 68.11, 115.20, 120.60,124.47,125.84, 126.34,126.41, 127.76,
128.30, 128.72, 133.09, 13630, 136.96, 140.35, 144.44, 163.67.
f) Synthesis of 5,6-dihydro-5-oxo-ll//-indeno [1,2-c] isoquinoline (6):
Method I: To a stirred solution of the alcohol 3a (0.35 g, 1.4 mmol) in
trifluoroacetic acid (10 mL) was added at room temperature triethylsilane (0.812 g, 7 mmol)
and the reaction mixture was stirred for 24 h. Trifluoroacetic acid was evaporated in vacuo
and EtOAc was added to the resulting crude product. The resulting solid was filtered and
washed with H2O and EtOAc to provide the above-titled compound 6 (0.285 g, 87 %). 'H
NMR (DMSO-D6): 8 3.89 (s, 2H), 7.30 - 7.47 (m, 3H), 7.59 (d, J= 6.9 Hz, 1H), 7.72 -7.74
(m, 2H), 7.98 (d, J- 7.8 Hz, 1H), 8.23 (d, J=8.4 Hz, 1H), 12.31 (s, 1H); I3C NMR(DMSOD6):
6 33.51, 116.50, 120.19, 124.01, 125.51, 125.55, 126.42, 127.50, 127.68, 128.56,
133.45, 136.39, 137.53,140.18, 143.80, 163.46; MS (ES'): m/z 232.1 (M-l); Anal. Calcd
for C16HHNO: C, 82.38; H, 4.75; N, 6.00. Found: C, 81.79; H, 4.45, N, 5.99.
Method II: To a stirred suspension of 2 (40 g, 0.16 mol) in trifluoroacetic acid
(2.5 L) was added triethylsilane (94 g, 0.8 mol) in small portions at room temperature and
the reaction mixture was stirred for 96 h, during which time the reaction progress was
monitored using TLC (eluent - 5% MeOH/CH2Cl2). The reaction mixture was slowly
poured on ice, filtered, washed with copious amounts of H2O and MeOH and dried in vacuo
to provide the above-titled compound 6 (33.1 g, 88 %), whose spectral data were identical
to those of a sample of compound 6 that was obtained using Method I.
g) Synthesis of 9-chlorosulfonyl-5,6-dihydro-5-oxo-l lH-indeno[l,2-c] isoquinoline (7):
SO2CI
Compound 6 (40 g, 0.17 mol) was added in small portions to chlorosulfonyl chloride
(112 mL, 1.71 mol) at 0°C and the reaction mixture was allowed to warm to room
temperature and stir for 2 h. The reaction mixture was slowly poured on ice and the
resulting yellow solid was filtered, washed thoroughly with water and EtOAc and dried in
vacuo to provide the above-titled product 7 (52 g, 92 %). 'H NMR (DMSO-D6):
6 3.91 (s, 2H), 7.43 - 7.48 (m, 1H), 7.60 (d, J = 7.2 Hz, 1H), 7.74 - 7.76 (m, 2H), 7.79 (s,
1H), 7.90 (d, J= 7.5 Hz, 1H), 8.23 (d, J= 7.8 Hz, 1H), Anal. Calcd for CI6H12C1NO4S: C,
54.94; H, 3.46; N, 4.00. Found: C, 55.28; H, 3.43, N, 3.68, Karl-Fisher, 2.95.
-31-
h) Synthesis of 9-sulphonamido derivatives of 5,6-dihydro-5-oxo-ll#-indeno[l,2-
c]isoquinolines (8a-r) from 7:
8a-r
(Figure removed)
Method I: To a stirred suspension of 3-(4-morpholino)-l-propylamine (17.28 g,
0.12 mol) in EtOAc was added sat. aq. NaHCO3 (300 mL), and the mixture was allowed to
stir for 15 min. Compound 7 (4.0 g, 0.012 mol) was then introduced in small portions at
room temperature. The reaction mixture was stirred for 24h; filtered and washed with H2O,
EtOAc and MeOH; refluxed in MeOH for 30 min; filtered while still warm; and washed
with MeOH to provide the above-tited product 81 as a free base (2.330 g, 44%). 'H
NMR(DMSO-D6): 8 1.47-1.52 (m, 2H), 2.16-2.21 (m, 4H), 2.47-2.48 (m, 2H), 3.44-3.48
(m, 2H), 3.23 (m, 4H), 4.02 (s, 2H), 7.49 - 7.58 (m,lH), 7.78-7.82 (m, 3H), 7.97 (s, 1H),
8.14 (d,J= 7.8 Hz, 1H), 8.26 (d, J= 7.8 Hz,lH), 9.59 (s, 1H), 12.42 (s, 1H).
The free bases of 8d, 8g, 8h, 8j, 81, 8m-8r were also prepared by Method I, but
substituting 3-(4-morpholino)-l-propylamine with imidazole, 2-dirnethylamino-ethylamine,
2-(W-piperidinyl)-ethylamine, 2-(Af-morpholinyl)-ethylamine, 3-(Af-morpholinyl)-
propylamine, 3-(N-tetrahydropyrrolidinyl)-propylarnine, 3-(Af-imidazolyl)-propylamine, 3-
(A^-(4-methylpiperazinyl)-propylamine, di-(2-(diethylamino)-ethyl)amine, di-(2-
(dimethylamino)-ethyl)amine and di-(2-hydroxyethyl)amine, respectively.
9-(A/-sulphonylimidazole)-5,6-dihydro-5oxo-l l//-indeno[l,2-c)isoquinolines (8a-r):
Method II: To a stirred suspension of 3-(4-morpholino)-l-propylamine (4.250 g) in
CH2C12 (100 mL) was added 7 (1.950 g, 5.89 mmol) and the resulting mixture was stirred
for 5 minutes. Subsequently, triethylamine (3 mL) was added and the reaction mixture was
stirred for 24 hr at room temperature. After this time the precipitate was collected and
washed with MeOH (2 x 100 mL) and the crude solid product transferred to a round bottom
flask. This material was diluted with MeOH (200 mL), heated to reflux for 30 min. and
filtered while still warm. The resulting filtercake was washed with MeOH (200 mL) to
provide the desired product as the free base of 81 (1.460 g, 56%).
The free bases of compounds 8a-r were prepared using Method II, but substituting
3-(4-morpholino)-l-propylamine with imidazole, 2-dimethylamino-ethylamine, 2-(Npiperidinyl)-
ethylamine, 2-(A/r-morpholinyl)-ethylamine, 3-(A^-morpholinyl)-propylamine, 3-
(AMetrahydropyrrolidinyl)-propylamine, 3-(Af-imidazolyl)-propylamine, 3-(N-(4-
methylpiperazinyl)-propylamine, di-(2-(diethylamino)-ethyl)amine, di-(2-(dimethylamino)-
ethyl)amine and di-(2-hydroxyethyl)amine, respectively.
i) General procedure for the preparation of mesylate salts of 8a-r:
Free base 81 was added to methanesulfonic acid at 0°C and the resulting mixture
was allowed to warm to room temperature and stir for 2 h. The reaction mixture was then
poured into cold MeOH (between -10°C and 0°C) and the precipitated solid was filtered,
washed with MeOH (100 mL) and dried in vacuo. The dried solid was then dissolved in
water (~200 mL) and lyophilized to provide the methanesulfonate monohydrate salt 81.
(1.020 g, 84%). 'H NMR (DMSO-D6): 8 1.75-1.85 (m, 2H), 2.35 (s, 3H), 2.78-2.84 (m, 2H),
2.96-3.12 (m, 4H), 3.36 (d, J= 12.3 Hz, 2H), 3.61 (t, 7= 11.4 Hz, 2H), 3.94 (d, J= 12.9 Hz,
2H), 4.03 (s, 2H), 7.49 - 7.55 (m, 1H), 7.76-7.84 (m, 3H), 7.99 (d, J= 0.9 Hz, 1H), 8.15 (d,
J= 8.4 Hz, 1H), 8.25 (d, J= 8.4 Hz, 1H), 9.59 (s, 1H), 12.42 (s, 1H); I3C NMR (DMSOD6):
5 24.27, 33.86,51.89,54.51,64.02, 119.70, 120.39, 123.53, 126.09,126.45, 128.63,
-33-
133.66, 135.80,138.71,141.21, 144.57,163.29; Anal. Calcd for C24H3IN3OgS2: C, 52.06; H,
5.46; N, 7.59, Karl-Fisher, 3.36. Found: C, 51.85; H, 5.35, N, 7.30, Karl-Fisher, 4.32.
Similarly, HC1, H2SO4, CHjCOOH, and succinic acid salts of 81 were prepared by
substituting methanesulfonic acid with HC1, H2SO4 and CH3COOH, respectively
Example 2. Effect of Illustrative Indeno[l,2-c]isoquinoline Compounds on PARS
activity in cultured macrophages, using a whole-cell based assay and a purified
enzyme assay.
Demonstration of illustrative Indeno[l,2-c]isoquinoline Compounds' ability to
inhibit PARS and prevent peroxynitrite induced cytotoxicity was shown using methods
described in Virag et al., BrJPharmacol 1999, 126(3):769-77; and Immunology 1998,
94(3):345-55. RAW mouse macrophages were cultured in DMEM medium with high
glucose and supplemented with 10% fetal bovine serum. Cells were used at 80%
confluence in 12-well plates. Cells were pretreated with various concentrations (100 nM -1
uM) of an Indeno[l,2-c]isoquinoline Compound for 10 min. Peroxynitrite, a prototypical
oxidant which induces DNA single strand breakage, was used to induce PARS activation.
Peroxynitrite was diluted in phosphate buffered saline (PBS) (pH 11.0) and added to the
cells in a bolus of 50 uJ. Cells were then incubated for ^0 min. Peroxynitrite was
decomposed by incubation for 30 min at pH 7.0, used as a control, and failed to influence
the parameter studied. After the 20 min incubation, the cells were spun, the medium was
aspirated and the cells were resuspended in 0.5 ml assay buffer (56 mM HEPES pH 7.5,
mM KC1, 28 mM NaCl, 2 mM MgCl2, 0.01 % w/v digitonin and 0.125 \M NAD+ and 0.5
uCi/ml 3H-NAD*). Following an incubation in assay buffer, (10 min at 37 °C), PARS
activity was measured as follows: 200 ul ice cold 50 % w/v TCA was added and the
samples were incubated for 4 hours at 4°C. Samples were then spun (10 min @ 10,000 g)
and pellets washed twice with ice cold 5 % w/v TCA and solubilized overnight in 250 ul 2
% w/v SDS/0.1 N NaOH at 37°C. The contents of the tubes were added to 6.5 ml
ScintiSafe Plus scintillation liquid (Fisher Scientific) and radioactivity was determined
using a liquid scintillation counter (Wallac, Gaithersburg, MD). The results shown in Table
1 demonstrate that the illustrative Indeno[l,2-c]isoquinoline Compounds significantly and
dose-dependently inhibit the activation of PARS in the macrophage assay.
Table 1. Inhibitory effect of various novel substituted indeno[l,2-c]isoquinolines on
PARS activation in cultured murine macrophages.
Compound No.
(Figure removed)
The potency of inhibition on purified PARS enzyme was subsequently determined
for selected Indeno[l,2-c]isoquinoline Compounds, and the potency was compared with
that of 3-aminobenzamide, a prototypical benchmark PARS inhibitor. The assay was
performed in 96 well ELISA. plates according to instructions provided with a commercially
available PARS inhibition assay kit (Trevigen, Gaithersburg, MD). Briefly, wells were
coated with 1 mg/mL histone (50 ul/well) at 4°C overnight. Plates were then washed four
times with PBS and then blocked by adding 50 ul Strep-Diluent (supplied with the kit).
After incubation (Ih, room temperature), the plates were washed four times with PBS.
Appropriate dilutions of PARS inhibitors were combined with 2x PARS cocktail (1.95 mM
NAD+, 50 uM biotinylated NAD+ in 50 mM TR1S pH 8.0, 25 mM MgCl2) and high specific
activity PARS enzyme (both were supplied with the kit) in a volume of 50 ul. The reaction
was allowed to proceed for .'JO min at room temperature. After 4 washes in PBS,
incorporated biotin was detected by peroxidase-conjugated streptavidin (1:500 dilution) and
TAGS Sapphire substrate. The assay confirmed the results of the macrophage-based PARS
assay. For example, the PARS inhibitor 81 exerted 50% inhibition of PARS activity in this
assay at 3 nM, and thus was approximately 50,000 times more potent than the reference
compound 3-aminobenzamide.
Example 3: Effects of illustrative Indeno[l,2-c]isoquinolinc Compounds in various
models of inflammatory disease and reperfusion disease
a: Effects of illustrative Indeno[l,2-c]isoquinoline Compounds on in vitro cell disease
models
In additional in vitro studies in isolated thymocytes, cells were exposed to
peroxynitrite or hydrogen peroxide (toxic oxidant species) to induce cytotoxicity. In this
system the toxicity is, at least in part, related to activation of the nuclear enzyme PARS. In
this oxidant-stimulated thymocyte assay (described, in detail, in Virag et al., Immunology
94(3):345-55, 1998), the compounds tested prevented the oxidant-induced suppression of
the viability of the cells and did so at the low nanomolar concentration range. An example
of this response (Compound 81) is shown in Table 2. This assay represents an in vitro
model of cells dying because of exposure to pro-oxidant species, as it occurs in during the
reperfusion of ischemic organs.
Table 2. Reduction of peroxynitrite induced cytotoxicity by 30 nM - 3 uM of the
Indeno[l,2-c]isoquinoline Compound 81.
Cytotoxicity
Control
b: Effect of illustrative Indeno[l,2-c]isoquinoline Compounds on in vivo models of
inflammatory diseases
In order to substantiate the efficacy of the compounds in inflammatory diseases, the
effect of illustrative Indeno[l,2-c]isoquinoline Compounds was demonstrated in a systemic
inflammatory model induced by bacterial lipopolysaccharide (LPS), which is reported to be
responsible for causing reperfusion diseases and inflammatory diseases such as septic shock
and systemic inflammatory response syndrome in animals (see Parrillo, N. Engl. J. Med.,
328:1471-1478 (1993) and Lamping, J. Clin. Invest. 101:2065-2071 (1998). In a series of
experiments, mice were pretreated with intraperitoneal injection of 0.1 and 1 mg/kg of
compounds 81, 8p and 8j, and LPS at 10 mg/kg was injected i.p., and TNF-alpha was
measured in the plasma at 90 minutes. As shown in Table 3, all compounds substantially
reduced TNF production, indicative of the compounds' anti-inflammatory activity.
Table 3. Reduction of LPS induced TNF production by 0.1 -1 mg/kg intraperitoneal
injection of the PARS inhibitor compounds 8L, 8P and 8J in mice in vivo
8j (0.1
(Figure removed)
All compounds markedly suppressed LPS induced TNF production when compared
to control.
At high doses, LPS causes multiple organ dysfunction resembling of septic shock,
and ultimately death (in part because of the early release of TNF-alpha). Similarly, in a
model induced by cecal ligation and puncture (CLP), the live bacteria that derive from the
intestinal flora induce systemic inflammation and shock. Agents that inhibit inflammatory
mediator production, PARS activation, and cell death in this model prevent mortality
induced by LPS or CLP. In experiments with Balb/c mice, injection of 100 mg/kg LPS
intraperitoneally caused death in 50% of the animals over 24 h, whereas treatment of the
animals with 3 mg/kg/day of compound 81 reduced the endo toxin-induced mortality to 10%
under the same experimental conditions. In response to CLP induced shock, compound 81
(3 mg/kg/day) caused a reduction in the mortality from 100% death to 60% death over 24
hours.
The data demonstrating the reduction of TNF production by illustrative Indeno[l,2-
c]isoquinoline Compounds in animals subjected to an inflammation model, coupled with
the fact that TNF production is an important trigger of inflammation in various
inflammatory diseases (such as, for example, colitis, arthritis and neuroinflammation and
shock) indicate that the Indeno[l,2-cjisoquinoline Compounds have therapeutic effects in
various systemic and local inflammatory diseases, including the rejection of transplanted
organs, which entails both an inflammatory disease component and a reperfusion disease
component and, accordingly, are useful for treating or preventing an inflammatory disease
or a reperfusion disease.
c: Effect of illustrative Indeno[l,2-c]isoquinoline Compounds on in vivo models of
reperfusion disease
In order to substantiate the efficacy of the Indeno[l,2-c]isoquinoline Compounds in
ischemia-reperfusion conditions, the effect of an illustrative Indeno[l,2-c]isoquinoline
Compound in a mouse model of ischemic and reperfused gut was tested. The superior
mesenteric artery was occluded for 45 min, followed by a reperfusion for 1 h. Following
the end of the reperfusion, gut permeability was measured with the FD4 method in evened
gut sacks (Liaudet et al; Shock 2000, 14(2):134-41). Ischemia-reperfusion increased the
permeability of the gut from 11 ± 4 to 216 ± 27 ml/min/cm2, indicative of severe damage of
the reperfused gut. Treatment with Compound 81 (3 mg/kg i.v., injected 10 min. prior to
initiation of reperfusion) reduced the increase in the permeability of the gut by
approximately 73%, indicating a marked maintenance of the gut function. The ischemiareperfusion
studies in the gut were associated with a 80% mortality over 12 hours, whereas
only 15% mortality was noted in the animals treated with 81.
In another set of experiments, the effect of Compound 81 in a rat model of middle
cerebral artery occlusion/reperfusion was assayed as described in Abdelkarim et al, IntJ
Mol Med 2001, 7(3):255-60. Occlusion lasted for 2 hours, followed by reperfusion for 24
hours. Infarct size was quantified with tetrazolium staining. Compound 81 was
administered at 3 mg/kg/day in 3 divided intraperitoneally injected doses, the first dose
being administered 10 min. prior to the initiation of reperfusion. There was an
approximately 80% reduction in the degree of cortical necrosis and neuronal death in the
animals administered with 81, when compared to vehicle-treated controls. This protection
also translated into functional benefit, such as neurological improvements in the PARS
inhibitor treated group.
These data indicate that the Indeno[l,2-c]isoquinoline Compounds have therapeutic
effects in various systemic and local conditions of reperfusion diseases, including the
rejection of transplanted organs, which entails both an inflammatory disease component and
a reperfusion disease component and, accordingly, are useful for treating or preventing an
inflammatory disease or a reperfusion disease.
d: Effect of illustrative Indeno[l,2-c]isoquinoline Compounds in a diabetes model
PARS inhibitors and PARS deficiency are known to reduce the development of
diabetes and the incidence of diabetic complications (Mabley et al., Br J Pharmacol. 2001,
133(6):909-9; and Soriano et al., Nat Med. 2001, 7(1): 108-13). In order to substantiate the
efficacy of the Indeno[l,2-c]isoquinoline Compounds in a diabetes model, a single highdose
streptozotocin model of diabetes was conducted as previously described. Briefly,
160 mg/kg streptozotocin was injected to mice treated with vehicle or with illustrative
Indeno[l,2-c]isoquinoline Compounds intraperitoneally (3 mg/kg) and 3 days later blood
sugar levels were determined using a blood glucose meter. The data shown in Table 4
demonstrate that the illustrative Indeno[l ,2-c]isoquinoline Compounds attenuate the
streptozotocin-induced onset of diabetes as they reduce the hyperglycemia.
Table 4. Reduction of streptozotocin (STZ) induced hyperglycemia by 3 mg/kg
intraperitoneal injection of the PARS inhibitor compounds 81, 8p and 8j in mice in
vivo
(Figure removed)
Accordingly, the Indeno[l,2-c]isoquinoline Compounds are useful for treating or
preventing diabetes or a diabetic complication.
The present invention is not to be limited in scope by the specific embodiments
disclosed in the examples which are intended as illustrations of a few aspects of the
invention and any embodiments that are functionally equivalent are within the scope of this
invention. Indeed, various modifications of the invention in addition to those shown and
described herein will become apparant to those skilled in the art and are intended to fall
within the scope of the appended claims.
A number of references have been cited, the entire disclosures of which have been
incorporated herein in their entirety.



WE CLAIM;
1. The indeno[l,2-c] isoquinoline compound:
(Formula Removed)
or a pharmaceutically acceptable hydrate or salt thereof, wherein: X is -CH2- or O;
R2 and R3 are independently -hydrogen, -halo, -alkylhalo, -hydroxy, -0-(C1-C5 alkyl), -C1-C3 alkyl, -NO2, -NH2, -CONH2, -C(0)OH, -OC(0)-C1-C5 alkyl or -C(0)0-C1-C5 alkyl;
either R8 is hydrogen and R9 is -A-B or R8 is -A-B and R9 is hydrogen; A is -SO2-, -SO2NH- or -NHCO-; and
B is -C1-C3 alkyl, -NZ1Z2, -alkylamino or a 5-10 membered aromatic or non-aromatic carbocycle in which 1-4 of the ring carbon atoms are independently replaced with a N, O or S atom, wherein the alkylamino or 5-10 membered aromatic or non-aromatic carbocycle is unsubstituted or substituted with one or more of -alkanol, -alkylamino, -aminoalkyl, -aminodialkyl or a 5-10 membered aromatic or non-aromatic carbocycle in which 1-4 of the ring carbon atoms are independently replaced with a N, O or S atom, wherein the -alkanol, -alkylamino, -aminoalkyl, -aminodialkyl or 5-10 membered aromatic or non-aromatic carbocycle is unsubstituted or substituted with -C1-C8, alkyl or -alkanol; and
Z1 and Z2 are independently -hydrogen or -C1-C8 alkyl, which is unsubstituted or substituted with one or more of -hydroxy or -NZ3Z4, where Z3 and Z4 are

independently -H or -C1-C3 alkyl, which is unsubstituted or substituted with one or more of -hydroxy or -NH2, or N, Z3 and Z4 are taken together to a 5-10 membered aromatic or non-aromatic carbocycle in which 1-4 ring carbon atoms are independently replaced with a N, O or S atom, at least one of which is a nitrogen atom, or N, Z1 and Z2 are taken together to form a 5-10 membered aromatic or non-aromatic carbocycle in which 1-4 ring carbon atoms are independently replaced with a N, O or S atom, at least one of which is a nitrogen atom.
2. The compound as claimed in claim 1, wherein A is -SO2- and B is -NZ1Z2.
3. The compound as claimed in claim 2, wherein Z1 and Z2 are independently hydrogen, or -C1-C5 alkyl, unsubstituted or substituted with hydroxy or -NZ3Z4, or, taken together, -NZ1Z2 form a 5-10 membered aromatic or non-aromatic carbocycle in which 1-4 ring carbon atoms are independently replaced with a N, O or S atom, at least one of which is a nitrogen atom.
4. The compound as claimed in claim 3, wherein Z3 and Z4 are independently hydrogen, or -C1-C3 alkyl, unsubstituted or substituted with hydroxy or -NH2 or, taken together, NZ3Z4 form a 5-10 membered aromatic or non-aromatic carbocycle in which 1-4 ring carbon atoms are independently replaced with a N, O or S atom, at least one of which is a nitrogen atom.
5. The compound as claimed in claim 4, wherein N, Z3 and Z4, taken together form an unsubstituted piperidine, or morpholine group, or a piperazine, pyrrolidine or imidazole group which may be unsubstituted or substituted with -N-(C1-C5 alkyl) or -N-C(0)(C1-C5 alkyl).
6. The compound as claimed in claim 4, wherein either NZ1Z2 or NZ3Z4 is a 5-10 membered aromatic or non-aromatic carbocycle in which one ring carbon atom is replaced with a nitrogen atom and up to 3 of the remaining ring carbon

atoms are independently replaced with a N, O or S atom, the carbocycle being unsubstituted or substituted with -C1-C5 alkyl, -alkanol or -alkylamino.
7. The indeno[l,2-c] isoquinoline compound as claimed in claim 1 being

(Formula Removed)
a pharmaceutically acceptable hydrate or salt thereof.
8.The indeno[l,2-c] isoquinoline compound as claimed in claim 1 being

(Formula Removed)
or a pharmaceutically acceptable hydrate or salt thereof.
9. An indeno[l,2-c] isoquinoline mesylate salt of the compound as defined in claim 1 having the formula:
(Formula Removed)
10. A compound as claimed in any of the preceding claims as and when used for preparing a composition.
11. A method for making an indeno[l,2-c] isoquinoline compound as claimed in claim 1 or a pharmaceutically acceptable salt or hydrate thereof having the formula

(Formula Removed)
81 (N-(3-morpholinopropyl)-5-oxo-6, 1 l-dihydro-5H-indeno[l,2-c]isoquinoline-9-sulfonamide).
the method comprising the steps of:
(i) allowing Compound 13a (6,1 l-dihydro-5H-indeno[l,2-c]isoquinoline-5-one)
(Formula Removed)
13a
to react with chlorosulfonic acid under conditions that are sufficient to make Compound 7 (5-oxo-6,ll-dihydro-5H-indeno[l,2-c]isoquinoline-9-sulfonyl chloride).

(Formula Removed)
7;
and
(ii) allowing Compound 7 to react with the compound having the formula
(Formula Removed)
in the presence of triethylamine or sodium carbonate, under conditions that are sufficient to make Compound 81.



Documents:

00478-DELNP-2004-Abstract-(07-08-2008).pdf

00478-delnp-2004-abstract.pdf

00478-DELNP-2004-Claims-(07-08-2008).pdf

00478-delnp-2004-claims.pdf

00478-delnp-2004-correspondence-others.pdf

00478-DELNP-2004-Description (Complete)-(07-08-2008).pdf

00478-delnp-2004-description (complete)-06-08-2008.pdf

00478-delnp-2004-description (complete)-11-07-2008.pdf

00478-delnp-2004-description (complete).pdf

00478-DELNP-2004-Form-1-(07-08-2008).pdf

00478-delnp-2004-form-1.pdf

00478-delnp-2004-form-13.pdf

00478-delnp-2004-form-18.pdf

00478-DELNP-2004-Form-2-(07-08-2008).pdf

00478-delnp-2004-form-2.pdf

00478-delnp-2004-form-3.pdf

00478-delnp-2004-form-5.pdf

00478-delnp-2004-gpa.pdf

00478-delnp-2004-pct-210.pdf

00478-delnp-2004-pct-220.pdf

00478-delnp-2004-pct-301.pdf

00478-delnp-2004-pct-401.pdf

00478-delnp-2004-pct-402.pdf

00478-delnp-2004-pct-409.pdf

00478-delnp-2004-pct-notification.pdf

478-DELNP-2004-Abstract-(11-07-2008).pdf

478-DELNP-2004-Claims-(06-08-2008).pdf

478-DELNP-2004-Claims-(11-07-2008).pdf

478-DELNP-2004-Correspondence-Others-(06-08-2008).pdf

478-DELNP-2004-Correspondence-Others-(11-07-2008).pdf

478-DELNP-2004-Correspondence-Others-(25-07-2008).pdf

478-DELNP-2004-Form-1-(11-07-2008).pdf

478-DELNP-2004-Form-2-(11-07-2008).pdf

478-DELNP-2004-Form-3-(11-07-2008).pdf

478-DELNP-2004-GPA-(11-07-2008).pdf

478-DELNP-2004-Others-Document-(11-07-2008).pdf

478-DELNP-2004-Others-Document-(25-07-2008).pdf

478-DELNP-2004-Petition-137-(11-07-2008).pdf

478-DELNP-2004-Petition-138-(11-07-2008).pdf


Patent Number 222591
Indian Patent Application Number 00478/DELNP/2004
PG Journal Number 36/2008
Publication Date 05-Sep-2008
Grant Date 19-Aug-2008
Date of Filing 27-Feb-2004
Name of Patentee INOTEK PHARMACEUTICALS CORPORATION
Applicant Address 100 CUMMINGS CENTER, BEVERLY, MA 01915, U.S.A.
Inventors:
# Inventor's Name Inventor's Address
1 ERKAN BALOGLU 75 ST. ALPHONSUS STREET, APT. #1204, BOSTON, MA 02120, U.S.A.
2 JOHN H. VAN DUZER 102 THURLOW STREET, GEORGETOWN, MA 01833, U.S.A.
3 CSABA SZABO 30 STARKNAUGHT HEIGHTS, GLOUCESTER, MA 01930, U.S.A.
4 ANDREW L. SALZAMAN 483 PLEASANT STREET, APT. #1, BELMONT, MA 02078, U.S.A.
5 PRAKASH G. JAGTAP 5 PINEHURST AVENUE, BEVERLY, MA 01915, U.S.A.
PCT International Classification Number C07D
PCT International Application Number PCT/US02/27585
PCT International Filing date 2002-08-30
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 09/944,524 2001-08-31 U.S.A.