申请人:Otsuka Pharmaceutical Factory, Inc.
公开号:US06372749B1
公开(公告)日:2002-04-16
The present invention provides pyrazolo[1,5-a]pyrimidine derivatives represented by the formula (1)
wherein R1 represents lower alkyl or the like; one of R2 and R3 represents hydrogen and the other represents phenyl having lower alkoxy or the like, and R4 is hydrogen, carboxyl, lower alkoxy-carbonyl or the like. The derivatives of the invention have pharmacological effects such as analgesic action, inhibitory effect on nitrogen monoxide synthetase and the like and are useful as analgesics. The derivatives of the invention are also useful as therapeutic or prophylactic agents for septicemia, endotoxin shock, chronic articular rheumatism, etc.
本发明提供了由式(1)表示的吡唑并[1,5-a]嘧啶衍生物,其中R1代表较低的烷基或类似物;R2和R3中的一个代表氢,另一个代表具有较低烷氧基或类似物的苯基,R4为氢、羧基、较低烷氧基羰基或类似物。本发明的衍生物具有镇痛作用、对一氧化氮合酶的抑制作用等药理效应,并可用作镇痛剂。本发明的衍生物还可用作败血症、内毒素休克、慢性关节风湿病等的治疗或预防剂。