申请人:Sánchez Casals Carles
公开号:US20100204476A1
公开(公告)日:2010-08-12
Dicyclohexylamine salt of formula (IIa) or a pharmaceutically acceptable solvate thereof, including a hydrate, and its process for preparation are provided. The invention also relates to processes for the preparation of montelukast of formula (I) or a pharmaceutically acceptable salt thereof, or a pharmaceutically acceptable solvate thereof, including a hydrate, based on the conversion of a salt of formula (IIa) into its form of free acid, followed by reaction with a compound of formula (III) CH3MgX, wherein X is halogen, in a suitable solvent, optionally in the presence of a Lewis acid.
本发明提供了公式(IIa)的二环己基胺盐或其药学上可接受的溶剂化物,包括水合物的制备方法。本发明还涉及基于将公式(IIa)的盐转化为其自由酸形式,然后与公式(III)CH3MgX化合物在适当溶剂中反应(可选地在路易斯酸的存在下),制备公式(I)的蒙特卢卡斯特或其药学上可接受的盐或溶剂化物,包括水合物的制备方法。