AZILSARTAN ALKYL ESTER, METHOD FOR PRODUCING AZILSARTAN METHYL ESTER, AND METHOD FOR PRODUCING AZILSARTAN

摘要

PROBLEM TO BE SOLVED: To provide azilsartan alkyl ester to be an intermediate of azilsartan, and a method for producing azilsartan methyl ester having a novel crystal form, and a method for producing high-purity azilsartan from an obtained compound.;SOLUTION: The present invention provides a method for producing high-purity azilsartan alkyl ester and/or azilsartan methyl ester by crystallizing azilsartan alkyl ester and/or azilsartan methyl ester in acetone or a solvent mixture of acetone and alcohol.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2018,JPO&INPIT