SUBSTANTIALLY PURE ZILEUTON AND PROCESS FOR PREPARING THEREOF

摘要

"SUBSTANTIALLY PURE ZILEUTON AND PROCESS FOR PREPARING THEREOF" The present invention relates to a process for preparing substantially pure Zileuton of formula (I) free from impurities having surface area 0.9 to 3.1 comprising the steps of: i) obtaining a solution of Zileuton in an organic solvent; ii) heating the solution; iii) cooling the solution; iv) isolating substantially pure Zileuton of formula (I).