申请人:OTSUKA PHARMACEUTICAL FACTORY, INC.
公开号:EP0795555A1
公开(公告)日:1997-09-17
The invention provides an analgesic composition comprising as an active ingredient at least one pyrazolo[1,5-a]pyrimidine derivative of the following formula (1):
wherein R11 represents hydrogen, lower alkyl, pyridyl, furyl, thienyl, phenyl optionally having lower alkyl or phenylthio as a substituent, N-(lower)alkylpyrrolyl or pyrazinyl; R12 represents hydrogen, halogen, phenyl, phenyl having halogen, phenylthio or trifluoromethyl as a substituent, phenyl having trifluoromethyl and nitro as substituents, or phenyl having lower alkoxy and phenylthio as substituents; R13 represents hydrogen, lower alkyl optionally having oxo, ethylenedioxy, lower alkanoyloxy, lower alkoxy, lower alkylthio, carboxyl, halogen or thienyl as a substituent, lower alkenyl, cycloalkyl, or phenyl optionally having 1 to 3 substituents selected from the group consisting of lower alkyl, halogen and lower alkoxy, furyl or thienyl; R14 represents hydrogen, carboxyl, lower alkoxycarbonyl, nitro, halogen, or lower alkyl having lower alkoxycarbonyl or the residue of an alkali metal salt of carboxylic acid as a substituent; R13 and R14 may conjointly form lower alkylene; R15 represents hydrogen, alkali metal, lower alkyl, phenyl optionally having 1 to 3 substituents selected from the group consisting of lower alkyl and lower alkoxy, pyridyl optionally having lower alkyl or halogen as a substituent, quinolyl or isoquinolyl; and A represents a single bond or lower alkylene. This composition exhibits potent analgesic activity and is effective for alleviating various types of pain such as postoperative pain.
本发明提供了一种镇痛组合物,其活性成分包括至少一种下式(1)的吡唑并[1,5-a]嘧啶衍生物:
其中 R11 代表氢、低级烷基、吡啶基、呋喃基、噻吩基、任选以低级烷基或苯硫基为取代基的苯基、N-(低级)烷基吡咯基或吡嗪基;R12 代表氢、卤素、苯基、以卤素、苯硫基或三氟甲基为取代基的苯基、以三氟甲基和硝基为取代基的苯基或以低级烷氧基和苯硫基为取代基的苯基;R13 代表氢、任选具有氧代、亚乙基氧基、低级烷酰氧基、低级烷氧基、低级烷硫基、羧基、卤素或噻吩基作为取代基的低级烷基、任选具有 1 至 3 个选自低级烷基、卤素和低级烷氧基、呋喃基或噻吩基组成的取代基的环烷基或苯基;R14 代表氢、羧基、低级烷氧基羰基、硝基、卤素或具有低级烷氧基羰基或羧酸碱金属盐残基作为取代基的低级烷基;R13 和 R14 可共同形成低级亚烷基;R15 代表氢、碱金属、低级烷基、可选择具有 1 至 3 个取代基的苯基,这些取代基可从低级烷基和低级烷氧基、可选择具有低级烷基或卤素作为取代基的吡啶基、喹啉基或异喹啉基组成的组中选出;以及 A 代表单键或低级亚烷基。这种组合物具有强效镇痛活性,可有效缓解各种疼痛,如术后疼痛。