申请人:Fujiyakuhin Co., Ltd.
公开号:EP1650204A1
公开(公告)日:2006-04-26
Provided is a process for producing 1,2,4-triazole compound (5), or a salt or hydrate thereof which comprises reacting compound (1) with Rc-X (2) to give compound (3), reacting compound (3) with a nitrilization agent to give compound (4), and then removing the group Rc, as shown by the reaction scheme:
(Wherein Ra, Rb and Rd represent a group, Rc represents a group which can be removed by an acid)
A 1,2,4-triazole compound (5) having an optionally substituted 2-cyanopyridin-4-yl group at 3-position and an optionally substituted aromatic group at 5-position which inhibits a xanthine oxidase and is useful for treatment of gout and hyperuricemia can be obtained from compound (1) in a high yield without requiring isolation of reaction products in the course of reactions.
本发明提供了一种生产 1,2,4-三唑化合物(5)或其盐或水合物的工艺,如反应方案所示,该工艺包括将化合物(1)与 Rc-X (2) 反应得到化合物(3),将化合物(3)与硝化剂反应得到化合物(4),然后除去基团 Rc:
(其中 Ra、Rb 和 Rd 代表基团,Rc 代表可被酸去除的基团)
一种 1,2,4-三唑化合物(5),在 3-位上有一个任选取代的 2-氰基吡啶-4-基团,在 5-位上有一个任选取代的芳香基团,可抑制黄嘌呤氧化酶,可用于治疗痛风和高尿酸血症,可以从化合物(1)高产率地得到,而不需要在反应过程中分离反应产物。