申请人:MERCK SHARP & DOHME LTD.
公开号:EP0362942A2
公开(公告)日:1990-04-11
Compounds of formula III:
wherein R¹ is a 5- or 6-membered aromatic heterocyclic group; and R⁴ and R⁵ each independently signify hydrogen, halogen, trifluoromethyl, cyano, nitro, amino or lower alkyl; are useful intermediates in a novel process for the preparation of a class of pharmacologically active compounds of formula I:
wherein R¹, R⁴ and R⁵ are as defined above; and R³ represents hydrogen or lower alkyl.
式 III.化合物
其中 R¹ 是 5 或 6 元芳香杂环基团;R⁴ 和 R⁵ 各自独立地表示氢、卤素、三氟甲基、氰基、硝基、氨基或低级烷基;是制备一类具有药理活性的式 I.化合物的新工艺的有用中间体:
其中 R¹、R⁴ 和 R⁵ 如上定义;R³ 代表氢或低级烷基。