[EN] A PROCESS FOR PREPARATION OF PRAZIQUANTEL<br/>[FR] PROCÉDÉ DE PRÉPARATION DE PRAZIQUANTEL
申请人:SEQUENT SCIENT LTD
公开号:WO2012081035A2
公开(公告)日:2012-06-21
The present invention discloses a novel, cost-effective process for preparation of a 4- oxo- 1,2,3,6,7,11b-hexahydro-4H-pyrazino-[2, 1-a]isoquinoline derivatives. Specifically it discloses a process for the preparation of anthelmenthic drug praziquantel incorporating a novel intermediate 2-[(2,2-dimethoxyethyl)benzyl amino]-N- phenethylacetamide. This invention also discloses a novel crystalline form of 4-oxo- 1,2,3,6,7,11b-hexahydro-4H-pyrazino[2, 1-a]isoquinoline.