Disclosed are a silodosin intermediate and a preparation method thereof. The silodosin intermediate has the structure shown by the formula (A). X is hydrogen or bromide and R
1
is hydrogen. The formyl group may be a group having the structure shown by the formula I. R
7
is a protecting group of carboxyl, and R
2
is 3-hydroxypropyl or a group having the structure shown by the formula II. W is a protecting group of hydroxyl. A compound of the formula (A) according to the present invention may further be used for preparing a compound having the structure shown by the formula (D). By means of the intermediate and the preparation method therefor provided by the present invention, high-purity optically pure silodosin can be obtained, and the optical purity is above 99%.
本发明公开了一种
硅唑洛辛中间体及其制备方法。
硅唑洛辛中间体具有公式(A)所示的结构。其中,X为氢或
溴,R1为氢。甲酰基基团可以是具有公式I所示结构的基团。R7为羧基的保护基团,R2为3-羟基丙基或具有公式II所示结构的基团。W是羟基的保护基团。根据本发明的公式(A)化合物还可以用于制备具有公式(D)所示结构的化合物。通过本发明提供的中间体及其制备方法,可以获得高纯度、光学纯度高于99%的
硅唑洛辛。