gem-DINITRO COMPOUNDS IN ORGANIC SYNTHESIS. 2. SYNTHESIS OF 4-NITROPYRAZOLES FROM DINITROMETHANE AND ITS DERIVATIVES

Article abstract of DOI:10.1007/BF00959723

A series of 4-nitropyrazoles was synthesized from dinitromethane and other gem-dinitro derivatives.New cyclization reactions of aliphatic azines with dinitromethane and an intramolecular cyclization of dinitroacetazines have been discovered, with which 4-nitropyrazoles substituted at the 3- and 5-positions of the pyrazole ring can be obtained in one stage.