| Title of Invention | AN IMPROVED PROCESS FOR PREPARATON OF 5,6-DIHYDRO-4H-4(S)- ETHYLAMINO-6(S)- METHYLTHIENO [2,3-B] THIOPYRAN-2-SUFONAMIDE-7,7-DIOXIDE |
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| Abstract | The present invention relates to resolution of (cis,trans) 5,6 -dihydro -4H-4-ethylamino-6-methylthieno[2,3-b] thiopyran-2-sulfonamide-7,7 -dioxide using dibenzoyl-L-tartaric acid monohydrate or di-p-toluoyl-L-tartaric acid monohydrate as a chiral resolving agent in presence of methanol to obtain hemitartarate salt of 5,6-dihydro-4H-4(S)-ethylamino-6(S) methylthieno [2,3-b] thiopyran-2-sulfonamide -7,7 -dioxide with de of > 95% followed by purification using methanol to obtain hemitartarate salt with de of >99%, Chemical purity >99.5% with cis isomer content of <0.1% and further converting into its pharmaceutically acceptable salts, preferably hydrochloride salt. |
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741-MUM-2004-ABSTRACT(6-7-2005).pdf
741-MUM-2004-ABSTRACT(9-7-2004).pdf
741-MUM-2004-ABSTRACT(GRANTED)-(14-6-2011).pdf
741-MUM-2004-CANCELLED PAGES(7-2-2011).pdf
741-MUM-2004-CLAIMS(6-7-2005).pdf
741-MUM-2004-CLAIMS(AMENDED)-(7-2-2011).pdf
741-MUM-2004-CLAIMS(GRANTED)-(14-6-2011).pdf
741-MUM-2004-CLAIMS(MARKED COPY)-(7-2-2011).pdf
741-MUM-2004-CORRESPONDENCE 30-6-2008.pdf
741-MUM-2004-CORRESPONDENCE(1-11-2010).pdf
741-MUM-2004-CORRESPONDENCE(10-12-2008).pdf
741-MUM-2004-CORRESPONDENCE(27-6-2008).pdf
741-MUM-2004-CORRESPONDENCE(7-2-2011).pdf
741-MUM-2004-CORRESPONDENCE(IPO)-(23-6-2011).pdf
741-MUM-2004-DESCRIPTION(COMPLETE)-(6-7-2005).pdf
741-MUM-2004-DESCRIPTION(GRANTED)-(14-6-2011).pdf
741-MUM-2004-DESCRIPTION(PROVISIONAL)-(9-7-2004).pdf
741-MUM-2004-FORM 1(23-8-2004).pdf
741-MUM-2004-FORM 1(23-9-2005).pdf
741-MUM-2004-FORM 1(6-7-2005).pdf
741-MUM-2004-FORM 1(7-2-2011).pdf
741-MUM-2004-FORM 1(9-7-2004).pdf
741-mum-2004-form 13(7-2-2011).pdf
741-MUM-2004-FORM 18 30-6-2008.pdf
741-MUM-2004-FORM 2(COMPLETE)-(6-7-2005).pdf
741-MUM-2004-FORM 2(GRANTED)-(14-6-2011).pdf
741-MUM-2004-FORM 2(PROVISIONAL)-(9-7-2004).pdf
741-MUM-2004-FORM 2(TITLE PAGE)-(7-2-2011).pdf
741-MUM-2004-FORM 2(TITLE PAGE)-(AMENDED)-(7-2-2011).pdf
741-MUM-2004-FORM 2(TITLE PAGE)-(COMPLETE)-(6-7-2005).pdf
741-MUM-2004-FORM 2(TITLE PAGE)-(GRANTED)-(14-6-2011).pdf
741-MUM-2004-FORM 2(TITLE PAGE)-(PROVISIONAL)-(9-7-2004).pdf
741-MUM-2004-FORM 26(23-9-2005).pdf
741-MUM-2004-FORM 26(7-2-2011).pdf
741-MUM-2004-FORM 3(1-11-2010).pdf
741-MUM-2004-FORM 3(23-8-2004).pdf
741-MUM-2004-FORM 3(6-7-2005).pdf
741-MUM-2004-FORM 3(7-2-2011).pdf
741-MUM-2004-FORM 3(9-7-2004).pdf
741-MUM-2004-FORM 5(23-8-2004).pdf
741-MUM-2004-FORM 5(7-2-2011).pdf
741-MUM-2004-FORM 5(9-7-2004).pdf
741-MUM-2004-FORM PCT-IPEA-409(7-2-2011).pdf
741-MUM-2004-OTHER DOCUMENT(7-2-2011).pdf
741-MUM-2004-REPLY TO EXAMINATION REPORT(7-2-2011).pdf
| Patent Number | 248069 | |||||||||||||||
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| Indian Patent Application Number | 741/MUM/2004 | |||||||||||||||
| PG Journal Number | 24/2011 | |||||||||||||||
| Publication Date | 17-Jun-2011 | |||||||||||||||
| Grant Date | 14-Jun-2011 | |||||||||||||||
| Date of Filing | 09-Jul-2004 | |||||||||||||||
| Name of Patentee | FDC LIMITED | |||||||||||||||
| Applicant Address | 142-148, S.V.ROAD, JOGESHWARI(WEST), MUMBAI 400 102, MHARASHTRA, INDIA | |||||||||||||||
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| PCT International Classification Number | C07D 495/04, C07D 495/00, C07D 495/06 | |||||||||||||||
| PCT International Application Number | N/A | |||||||||||||||
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