PROCESS FOR PREPARATION OF N-[2-BUTYL-3-[4-[3-(DIBUTYLAMINO)PROPOXY]BENZOYL]-5-BENZOFURANYL]METHANESULFONAMIDE, ACID ADDITION SALTS AND PRODUCT THEREOF

摘要

The present invention relates to a process for the preparation of highly pure N-[2- butyl-3-[4-[3-(dibutylamino)propoxy]benzoyl]-5- benzofuranyljmethanesulfonamide and pharmaceutically acceptable salts thereof having HPLC purity greater than 99.5%.