Pharmaceutically acceptable salts of 20(s)-camptothecins

Details Pharmaceutically acceptable salts of 20(s)-camptothecins Pharmaceutically acceptable salts of 20(s)-camptothecins

2006-07-04

2006-07-04

Aulakh, Charanjit S. (Department: 1625)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Having -c-, wherein x is chalcogen, bonded directly to...

C546S048000

Reexamination Certificate

active

07071203

ABSTRACT:
Described are pharmaceutically acceptable salts of a compound of formula (I)its tautomeric forms, its stereoisomers or its polymorphs, which is obtained by treating the compound of formula (I) with an acid selected from the group consisting of hydrohalo acid selected from the group consisting of hydrochloric acid or hydrobromic acid, acetic acid; sulfuric acid, nitric acid, phosphoric acid, boric acid, perchloric acid, tartaric acid, maleic acid, citric acid, methanesulfonic acid, benzoic acid, ascorbic acid, salicylic acid and benzene sulfonic acid wherein R1represents substituted (C1–C6) alkyl wherein the substituent(s) is selected from mono (C1–C6) alkylamino or di (C1–C6) alkylamino; R2represents hydroxy;R3, R4and R5represent hydrogen; andR6represents hydrogen, or substituted (C1–C6) alkyl, wherein the substituent(s) is selected from halogen, hydroxy or (C1–C6) alkoxy and methods for using these compounds.

REFERENCES:
patent: 6177439 (2001-01-01), Duvvuri et al.
patent: 1 029 863 (2000-08-01), None
Database EPODOC “On Line” European Patent Office, The Hague, NL; May 16, 1990 Xueqiu Gu, et al.: “Preparation for Comptothecin Arginine Salt” XP002225687; Abstract; & CN 1 042 151 A (Xueqiu Gu).

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