申请人:OTSUKA PHARMACEUTICAL FACTORY, INC.
公开号:EP0714898A1
公开(公告)日:1996-06-05
The invention provides a pyrazolo[1,5-a]pyrimidine derivative of the following formula (1):
wherein R¹ is hydrogen, lower alkyl which may have thienyl, lower alkoxy, lower alkylthio, oxo or hydroxyl as a substituent, cycloalkyl, thienyl, furyl, lower alkenyl, or phenyl which may have 1 to 3 substituents selected from the group consisting of lower alkyl, lower alkoxy, phenylthio and halogen; R² is naphthyl, cycloalkyl, furyl, thienyl, optionally halogen-substituted pyridyl, optionally halogen-substituted phenoxy, or phenyl which may have 1 to 3 substituents selected from the group consisting of lower alkyl, lower alkoxy, halogen, nitro, halogen-substituted lower alkyl, halogen-substituted lower alkoxy, lower alkoxycarbonyl, hydroxyl, phenyl(lower)alkoxy, amino, cyano, lower alkanoyloxy, phenyl and di(lower)alkoxyphosphoryl(lower)alkyl; R³ is hydrogen, phenyl or lower alkyl; R⁴ is hydrogen, lower alkyl, lower alkoxycarbonyl, phenyl(lower)alkyl, optionally phenylthio-substituted phenyl, or halogen; R⁵ is hydrogen or lower alkyl; R⁶ is hydrogen, lower alkyl, phenyl(lower)alkyl, or benzoyl having 1 to 3 substituents selected from the group consisting of lower alkoxy, halogen-substituted lower alkyl and halogen; R¹ and R⁵ may conjointly form lower alkylene; Q is carbonyl or sulfonyl; A is a single bond, lower alkylene or lower alkenylene; and n is 0 or 1. This derivative is useful as a potent analgesic.
本发明提供了下式(1)的吡唑并[1,5-a]嘧啶衍生物:
其中 R¹ 是氢、可具有噻吩基、低级烷氧基、低级烷硫基、氧代或羟基作为取代基的低级烷基、环烷基、噻吩基、呋喃基、低级烯基或可具有 1 至 3 个选自低级烷基、低级烷氧基、苯硫基和卤素的取代基的苯基;R² 是萘基、环烷基、呋喃基、噻吩基、任选卤素取代的吡啶基、任选卤素取代的苯氧基或苯基,可具有 1 至 3 个取代基,这些取代基可从低级烷基、低级烷氧基、卤素、硝基和卤素组成的组中选出、低级烷氧基、卤素、硝基、卤素取代的低级烷基、卤素取代的低级烷氧基、低级烷氧基羰基、羟基、苯基(低级)烷氧基、氨基、氰基、低级烷酰氧基、苯基和二(低级)烷氧基磷酰(低级)烷基;R³ 是氢、苯基或低级烷基;R⁴ 是氢、低级烷基、低级烷氧基羰基、苯基(低级)烷基、任选的苯硫基取代苯基或卤素;R⁵ 是氢或低级烷基;R⁶ 是氢、低级烷基、苯基(低级)烷基或具有 1 至 3 个取代基的苯甲酰基,取代基可从低级烷氧基、卤素取代的低级烷基和卤素组成的组中选出;R¹ 和 R⁵ 可共同形成低级亚烷基;Q 是羰基或磺酰基;A 是单键、低级亚烷基或低级亚烯基;n 是 0 或 1。这种衍生物可用作强效镇痛剂。