申请人:Dainippon Sumitomo Pharma Co., Ltd.
公开号:EP2450343A1
公开(公告)日:2012-05-09
The present invention provides a process for producing Droxidopa or a pharmaceutically acceptable salt thereof comprising a step of reacting threo-N-phthaloyl-3-(3,4-dihydroxyphenyl)-L-serine represented by the formula (1) with methylamine, whereby a process for producing threo-3-(3,4-dihydroxyphenyl)-L-serine (common name: Droxidopa), which is useful as an agent for treatment of peripheral orthostatic hypotension or an agent for treatment of Parkinson's disease, with high production efficiency and without requiring troublesome operations.
本发明提供了一种生产屈昔多巴或其药学上可接受的盐的工艺,该工艺包括使式(1)所代表的硫代-N-邻苯二甲酰基-3-(3,4-二羟基苯基)-L-丝氨酸与甲胺反应的步骤,从而提供了一种生产硫代-3-(3,4-二羟基苯基)-L-丝氨酸(通用名称:屈昔多巴)的工艺:Droxidopa)的生产工艺,该产品可用于治疗外周性正位性低血压或帕金森病,生产效率高,无需繁琐的操作。