申请人:TEIKOKU HORMONE MFG. CO., LTD.
公开号:EP0919552A1
公开(公告)日:1999-06-02
A benzothiophene compound represented by a formula:
wherein R1 represents a lower alkyl group, and
R2 represents a halogen atom; a lower alkyl group; or a cycloalkyl group or cycloalkenyl group which may optionally be substituted with a lower alkyl group, a hydroxy group, an acyloxy group or an oxo group,
which is a useful intermediate for synthesizing a 2-substituted-3-(4-substituted benzoyl)-6-hydroxybenzo[b]thiophene derivative having an antiestrogenic activity can be produced in an industrially advantageous manner by subjecting a compound represented by a formula:
to a ring-closing reaction. Further, the novel compound of the formula (II) described above is a useful intermediate in the process of the present invention.
一种由式表示的苯并噻吩化合物:
其中 R1 代表低级烷基,和
R2 代表卤素原子;低级烷基;或环烷基或环烯烃基,可任选被低级烷基、羟基、酰氧基或氧代基取代、
将式 1 所代表的化合物进行合环反应,可以生产出具有抗雌激素活性的 2-取代-3-(4-取代苯甲酰基)-6-羟基苯并[b]噻吩衍生物,该衍生物是合成具有抗雌激素活性的 2-取代-3-(4-取代苯甲酰基)-6-羟基苯并[b]噻吩衍生物的有用中间体:
代表的化合物进行闭环反应。此外,上述式(II)的新型化合物是本发明工艺中有用的中间体。