Methods for the preparation of 4-hydroxy benzothiophene
申请人:——
公开号:US20020010345A1
公开(公告)日:2002-01-24
The present invention is concerned with a novel process for the preparation of the hydroxybenzothiophene of formula I
1
comprising cyclocarbonylation of a compound of formula II
2
wherein Y is as defined in the specification, followed by saponification. The compound of Formula I is a building block of pharmaceutically active substances, e.g. 5-[4-[2-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]-7-benzothiophenylmethyl]-2,4-thiazolidinedione and the corresponding sodium salt which are from agents useful in the treatment of diabetes.
Process for the preparation of benzothiophene derivatives
申请人:F. HOFFMANN-LA ROCHE AG
公开号:EP1078923A2
公开(公告)日:2001-02-28
The present invention is concerned with a novel process for the preparation of the hydroxybenzothiophene of Formula I
comprising cyclocarbonylation of a compound of Formula II
wherein -OR is as defined in the specification, followed by saponification. The compound of Formula I is a building block of pharmaceutically active substances, e.g. 5-[4-[2-(5-methyl-2-phenyl-4-oxazolyl)ethoxy]-7-benzothiophenylmethyl]-2,4-thiazolidinedione and the corresponding sodium salt.
本发明涉及一种制备式 I 的羟基苯并噻吩的新工艺
包括对式 II 的化合物进行环羰基化反应
其中 -OR 如说明书中所定义,然后进行皂化。式 I 的化合物是药物活性物质的构件,例如 5-[4-[2-(5-甲基-2-苯基-4-恶唑基)乙氧基]-7-苯并噻吩甲基]-2,4-噻唑烷二酮和相应的钠盐。