PYRAZOLO 1,5-a]PYRIMIDINE DERIVATIVE AND ANTI-INFLAMMATORY CONTAINING THE SAME.

摘要

Pyrazolo[1,5-a]pyrimidine derivatives represented by general formula (I), wherein R1, R2, R3 and R4 represent each hydrogen, carboxyl, lower alkoxycarbonyl, phenyl, or lower alkyl or cycloalkyl which may be each substituted with hydroxy, carboxyl or lower alkoxycarbonyl, or alternatively R1 and R2 maybe combined together to form lower alkylene; R5 represents -SR6 or -NR7R8; R6 represents pyridyl or phenyl which may be substituted with one to three groups selected from among hydroxy and lower alkyl and R7 and R8 represent each hydrogen or phenyl which may be substituted with one to three groups selected from among hydroxy, lower alkyl, lower alkoxycarbonyl and carboxyl, or alternatively R7 and R8 may be combined to form, together with the nitrogen atom to which they are bound, 1-pyrrolidinyl, 2-oxo-1-pyrrolidinyl, phenyl which may be substituted with halogen or trihalomethyl, or 1-piperazinyl which may be substituted with hydroxy-lower alkyl or diphenyl-lower alkyl, salts thereof, and an anti-inflammatory containing as the active ingredient the compound with the above formula wherein R1, R3 and R4 represent each hydrogen, R2 represents lower alkyl or cycloalkyl, and R5 represents -NR7R8 wherein R7 represents hydrogen and R8 represents phenyl substituted with hydroxy and two lower alkyl groups.