Patent ID: 6734308
Filing Date: 2004-05-11
Classification: A61P,C07D

Abstract:
A process for preparing 6-[(4-chloro-phenyl)-hydroxy-(3-methyl-3H-imidazol-4-yl)-methyl]-4-(3-ethynyl-phenyl)-1-methyl-1H-quinolin-2-one, 2,3-dihydroxy butanedioate anhydrous salt comprising azeotropic removal of water from 6-[(4-chloro-phenyl)-hydroxy-(3methyl-3H-imidazol-4-yl)-methyl]-4-(3-ethynyl-phenyl)-1-methyl-1H-quinolin-2-one, 2,3-dihydroxy butanedioate hydrate salt.