METHOD FOR PRODUCING CRYSTAL POLYMORPH OF 2-(3-CYANO-4-ISOBUTYLOXYPHENYL)-4-METHYLTHIAZOLE-5-CARBOXYLIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for selectively manufacturing crystal A of 2-(3-cyano-4-isobutyloxyphenyl)-4-methylthiazole-5-carboxylic acid. SOLUTION: The manufacturing method for crystal A of 2-(3-cyano-4-isobutyloxyphenyl)-4-methylthiazole-5-carboxylic acid comprises dissolving 2-(3-cyano-4-isobutyloxyphenyl)-4-methylthiazole-5-carboxylic acid in 1-propanol, 2-propanol or acetonitrile and then cooling it. COPYRIGHT: (C)2011,JPO&INPIT