The 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, R1 is a protecting group, and R2 is cyano or carbamoyl, are separated.
本发明涉及一种制备光学纯度高达99.9%对映体过量(e.e.)或以上的
硅多西林的方法。该方法利用了一种步骤,其中在由一般式V表示的化合物的外消旋混合物中包含的对映体被分离,其中*表示不对称中心,R1是保护基,R2是
氰基或
氨基甲酰基。