Process for the preparation of [R-(E)-1-[[[1-[3-[2-[7-chloro-2-quinolinyl]ethenyl]phenyl]-3-[2-(1-hydroxy-1-methylethyl)phenyl]propyl]thio]methyl]cyclopropaneacetic acid (montelukast) and its pharmaceutically acceptable salts
申请人:Sundaram Venkataraman
公开号:US20050234241A1
公开(公告)日:2005-10-20
The present invention is related to a process for preparing montelukast involving the compound of formula (VI):
wherein X═CN or CONH
2
.
本发明涉及一种制备蒙特卢卡斯特的方法,涉及到化合物的公式(VI):其中X=CN或CONH2。
[EN] MONTELUKAST HEXAMETHYLENEDIAMINE SALT AND ITS USE FOR THE PREPARATION OF MONTELUKAST SODIUM<br/>[FR] MONTÉLUKAST À L'ÉTAT HEXAMÉTHYLÈNE-DIAMINE, ET SON UTILISATION POUR L'ÉLABORATION DE MONTÉLUKAST SODIQUE
申请人:ALEMBIC LTD
公开号:WO2011004298A1
公开(公告)日:2011-01-13
The present invention relates to a montelukast hexamethylenediamine, Formule (I). It also relates to a process for the preparation of montelukast hexamethylenediamine and its use for the preparation of Montelukast Sodium.
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.
New and Practical Synthesis of Montelukast Sodium, an Antiasthmatic Drug
作者:M. Saravanan、B. Satyanarayana、P. Pratap Reddy
DOI:10.1080/00397911.2012.684755
日期:2013.8.3
Abstract A new and practical synthesis of montelukast sodium, an antiasthmatic drug, is described. The key steps are the synthesis of nitrile derivative 4 by chiral reduction of keto ester 9 using (−)-DIP-Cl, synthesis of vinylquinoline framework 16 by Wittig reaction, and Heck coupling of nitrile 4 with vinylquinoline 16. The method is operationally simple and suitable for the industrial production