PROCESS FOR THE PREPARATION OF PYRIDO [2,1-a] ISOQUINOLINE DERIVATIVES COMPRISING OPTICAL RESOLUTION OF AN ENAMINE
申请人:Abrecht Stefan
公开号:US20080071087A1
公开(公告)日:2008-03-20
This invention relates to a process for the preparation of pyrido[2,1-a]isoquinoline derivatives of the formula
wherein R
1
, R
2
, R
3
and R
4
are defined in the specification, comprising the optical resolution of an enamine of the formula
wherein R
1
is lower alkyl, in the presence of an optical active resolving agent to form an (S)-enamine salt of the formula
wherein RCO
2
−
is the conjugate base of the resolving agent.
本发明涉及一种制备式为pyrido[2,1-a]异喹啉衍生物的方法,其中R1、R2、R3和R4在规范中有定义,包括在具有手性分离剂的存在下,光学分辨式为R1为低级烷基的恩酰胺,形成式为RCO2-的手性(S)-恩酰胺盐。