Process for preparation of chiral amlodipine salts
申请人:Joshi Rohini R.
公开号:US06846932B1
公开(公告)日:2005-01-25
A process for the preparation of pharmaceutically acceptable salts of chiral Amlodipine namely S(−) Amlodipine and R(+) Amlodipine from without isolation of a free base from with optical purity rank between 96-99% is described in the present invention. The process comprises resolving RS amlodipine base using of L(+) or D(−) tartaric acid to obtain salt of corresponding to the acid used in ee rang from 96-99%.
[EN] PROCESS FOR PREPARATION OF CHIRAL AMLODIPINE SALTS<br/>[FR] PROCEDE DE PREPARATION DE SELS CHIRAUX D'AMLODIPINE
申请人:COUNCIL SCIENT IND RES
公开号:WO2005049571A1
公开(公告)日:2005-06-02
A process for the preparation of pharmaceutically acceptable salts of chiral Amlodipine namely S(-) Amlodipine and R(+) Amlodipine without isolation of the chiral free base wherein the product has optical purity ranging between 96-99% is described in the present invention. The process comprises resolving RS amlodipine base using L(+) or D(-) tartaric acid followed by reaction of the separated tartrate salt with an organic acid to obtain the salt corresponding to the acid used in ee ranging from 96-99%.