Process for resolution of 2-amino-6-propylamino-4,5,6,7-tetrahydrobenzthiazole and compounds therefor
申请人:——
公开号:US20020103240A1
公开(公告)日:2002-08-01
A process for resolving or enriching (R,S) 2-amino-6-propylamino-4,5,6,7-tetrahydrobenzothiazole (pramipexole) into optical isomers uses a monovalent salt thereof, e.g. pramipexole monohydrochloride, as a substrate. The monovalent salt is treated with an optically active acid, e.g. with L(+)-tartaric acid, to yield a diastereomeric mixed salt. The mixed salt is subjected to fractional crystallization to yield an optically enriched mixed salt. The mixed salt can be treated with base to liberate the desired isomer of pramipexole.
将(R,S)-2-氨基-6-丙基氨基-4,5,6,7-四氢苯并噻唑醇(普拉米贝克索)分离或富集成光学异构体的过程使用其一价盐,例如普拉米贝克索单盐酸盐,作为底物。将这一价盐与光学活性酸处理,例如与L(+)-酒石酸处理,得到一个对映异构的混合盐。将混合盐经过分级结晶处理,得到光学富集的混合盐。混合盐可以用碱处理以释放普拉米贝克索的所需异构体。