申请人:Indukuri Venkata Sunil Kumar
公开号:US20110112300A1
公开(公告)日:2011-05-12
A method for the preparation of montelukast and salts thereof has been described. The method comprises of following steps: (a) (S)-1-(3-((E)-2-(7-chloroquinolin-2-yl)vinyl)phenyl)-3-(2-isopropenylphenyljpropyl methane sulphonate (styrene mesylate salt) (b) coupling with
1
-(mercapto methyl)cyclopropane acetic acid followed by salification with an amine gives styrene amine salt (c) Converting styrene amine salt to Montelukast amine salt (d) Converting Montelukast amine salt to Montelukast free acid and or its required alkali/alkaline salt.
已经描述了一种制备蒙特卢卡斯特及其盐的方法。该方法包括以下步骤:(a) (S)-1-(3-((E)-2-(7-氯喹啉-2-基)乙烯基)苯基)-3-(2-异丙基苯基)丙烷磺酸盐(苯乙烯甲磺酸盐) (b) 与1-(巯基甲基)环丙酸偶联,然后用胺盐化,得到苯乙烯胺盐(c) 将苯乙烯胺盐转化为蒙特卢卡斯特胺盐(d) 将蒙特卢卡斯特胺盐转化为蒙特卢卡斯特游离酸和/或所需的碱/碱性盐。