Processes and intermediates useful in the preparation of Cis 1,3,4,6,7 llb-Hexa-hydro-7-aryl-2H-pyrazino[2,1-a]isoquinolines
申请人:PENNWALT CORPORATION
公开号:EP0300074A1
公开(公告)日:1989-01-25
Process of preparing the cis isomeric form of pyrazino [2,1-a] isoquinolines of formula
The process involves novel 2-piperazinones of formula
and novel pyrazino [2,1-a] isoquinolines of formula