Pyrazolidine-3,5-diones with heterocyclic substituents. III. Oxidation of 4-Monoalkylpyrazolidine-3,5-diones

Abstract

4-Alkylpyrazolidine-3,s-diones with phenyl or 3-phenyl-1H-1,2,4- triazol-5-yl substituents on N 1 or N 2 were oxidized with oxygen or hydrogen peroxide in acidic, basic or neutral media. Conditions under which 4-hydroxypyrazolidinediones and monohydrazides of malonic or tartronic acids are formed were noted.