NOVEL PROCESS FOR PREPARING 1-(MERCAPTOMETHYL) CYCLOPROPANEACETIC ACID, A USEFUL INTERMEDIATE IN THE PREPARATION OF MONTELUKAST AND SALTS THEREOF

摘要

The present invention provides a novel montelukast intermediate and a simple and straightforward process for preparing it. According to the present invention, by using this intermediate and the process, essentially as described herein, montelukast acid and salts thereof are obtained.