[Synthesis of pyrazole and pyrazolo [4,3-d] pyrimidinone derivatives. II]

Three new series of pyrazolic and pyrazolo-pyrimidinonic derivatives (II a-g), (III a-g) and (IV a-g), containing the substituted phenyl-hydrazide moiety were prepared and studied in order to check some information on the analgesic and antipyretic activity of an analogous series obtained in a previous work. Some derivatives (II b), (II d), (II f), (III b), (III c) and (IV d) show interesting analgesic activity.