5-ALKYL-1-PHENYL-2-PIPERAZINOALKYLPYRAZOLIN-2-ONE DERIVATIVES

摘要

5-alkyl-1-phenyl-2-piperazinoalkylpyrazolin-3-one compounds of the Formula I in which R1 is a straight-chain, branched or cyclic alkyl group with up to 6 carbon atoms, Z is an alkylene chain with 2 to 4 carbon atoms, and 1-phenyl substituent is an optionally substituted phenyl ring, and R4 is a phenyl or pyridyl group which is optionally substituted and their preparation are described. The compounds have pharmacological, particularly antiallergic, properties.