PROCESS FOR THE PREPARATION OF CIS-2-METHYLSPIRO (1, 3-OXATHIOLANE 5-3') QUINUCLIDINE
申请人:Kovi Ravishanker
公开号:US20110301352A1
公开(公告)日:2011-12-08
Methods are provided for making pharmaceutical-grade cis-2-methylspiro(1,3-oxathiolane-5,3′)quinuclidine and pharmaceutically acceptable salts thereof by isomerizing racemic 2-methylspiro(1,3-oxathiolane-5,3′)quinuclidine to cis-2-methylspiro(1,3-oxathiolane-5,3′)quinuclidine and subsequent purification of the C-MSOQ by salt formation with inexpensive and commercially available material such as sulfuric acid. Purification methods are disclosed which employ an organic solvent/water system and recrystallization with an organic solvent such as acetone.
提供了一种制备医药级顺式-2-甲基螺(1,3-噁唑烷-5,3')喹啉及其药学上可接受的盐的方法,包括将外消旋的2-甲基螺(1,3-噁唑烷-5,3')喹啉异构化为顺式-2-甲基螺(1,3-噁唑烷-5,3')喹啉,并通过与廉价和商业化的材料(如硫酸)形成盐来纯化C-MSOQ。还揭示了采用有机溶剂/水系统和有机溶剂(如丙酮)再结晶的纯化方法。