申请人:SEQUENT SCIENTIFIC LIMITED
公开号:US20130289275A1
公开(公告)日:2013-10-31
The present disclosure describes 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 the anthelmintic drug praziquantel through the use of a novel intermediate, 2-[(2,2-dimethoxyethyl)benzyl amino]-N-phenethylacetamide. This present disclosure also describes a novel crystalline form of 4-oxo-1,2,3,6,7,11b-hexahydro-4H-pyrazino[2,1-a]isoquinoline.
本公开说明描述了一种新颖、具有成本效益的制备4-氧代-1,2,3,6,7,11b-六氢-4H-吡嗪[2,1-a]异喹啉衍生物的工艺。具体而言,它揭示了一种通过使用新型中间体2-[(2,2-二甲氧基乙基)苯基甲基] -N-苯乙酰胺制备抗蠕虫药普鲁奎酮的工艺。本公开说明还描述了一种新颖的晶体形式4-氧代-1,2,3,6,7,11b-六氢-4H-吡嗪[2,1-a]异喹啉。