METHOD FOR PREPARING SILODOSIN

摘要

12The present invention relates to a process for preparing silodosin with high optical purity up to 99.9% enantiomeric excess (e.e.) or above. The process makes use of a method step in which the enantiomers contained in a racemic mixture of a compound represented by the general formula V: wherein * denotes the asymmetric center R is a protecting group and R is cyano or carbamoyl are separated.