The present invention provides a production method a biaryltetrazole derivative useful as an intermediate for an angiotensin II receptor antagonist.
The production method of present invention comprises
1) reacting an aryltetrazole derivative of the formula [II] with a benzene derivative of the formula [III];
2) In the obtained compound of the formula [IV], deprotecting the compound wherein R2 is a methyl group substituted by hydroxyl group(s) protected by a protecting group, or reducing the compound wherein R2 is a lower alkoxycarbonyl group, to give the compound of the formula [V]; and
3) halogenating the compound the formula [IV] wherein R2 is a methyl group, or the compound of the formula [V] when R2 in the compound of the formula [IV] is a methyl group substituted by hydroxyl group(s) protected by a protecting group, or a lower alkoxycarbonyl group,
wherein each symbol is as defined in the specification.
本发明提供了一种可用作
血管紧张素 II 受体拮抗剂中间体的双芳基
四氮唑衍
生物的生产方法。
本发明的生产方法包括
1)将式[II]的芳基
四唑衍
生物与式[III]的苯衍
生物反应;
2) 在得到的式[IV]化合物中,对其中 R2 为被羟基取代的甲基并受保护基团保护的化合物进行脱保护,或对其中 R2 为低级烷氧羰基的化合物进行还原,得到式[V]化合物;以及
3) 卤化式[IV]化合物(其中 R2 为甲基)或式[V]化合物(当式[IV]化合物中的 R2 为被羟基取代并受保护基团或低级烷氧羰基保护的甲基时)、
其中各符号如说明书中所定义。