Process for the Preparation of Montelukast and Its Pharmaceutically Acceptable Salts
申请人:Reddy Manne Satyanarayana
公开号:US20090171092A1
公开(公告)日:2009-07-02
An improved process for the preparation of Montelukast and its pharmaceutically acceptable salts comprises of reacting (S) Benzenepropanol α-[3-[2-(7-chloro2-quinolinyl)ethenyl]phenyl]-2-(1-hydroxy-1-methyl ethyl)-α-methane sulfonate compound of formula (II) with
1
-(mercapto methyl)cyclo propane acetic acid or its ester or nitrile in presence of alkali or alkaline carbonates and/or alkali or alkaline earth metal alkoxide in a suitable polar aprotic solvent with or without combination of C
1
-C
4
alcoholic solvents and then treating with organic amine in a suitable ester and/or acetone and/or aliphatic or aromatic hydrocarbon solvents, and converting the corresponding amine salt compound of montelukast into its sodium salt compound of formula (I) using sodium ion source in methanol, without converting into montelukast free acid.
一种改进的蒙特卢卡斯特及其药用可接受盐的制备过程包括将公式(II)的(S)苯基丙醇α-[3-[2-(7-氯2-喹啉基)乙烯基]苯基]-2-(1-羟基-1-甲基乙基)-α-甲烷磺酸盐化合物与1-(巯基甲基)环丙酸或其酯或腈在碱性或碱性碳酸盐和/或碱性或碱性土金属烷氧化物的存在下,在适当的极性无水溶剂中反应,可以使用C1-C4醇类溶剂的组合,然后在适当的酯和/或丙酮和/或脂肪或芳香烃溶剂中用有机胺处理,将蒙特卢卡斯特对应的胺盐化合物转化为其钠盐化合物公式(I),在甲醇中使用钠离子源,而不转化为蒙特卢卡斯特游离酸。