Phenylglyoxal dihydrazones as unexpected products in the synthesis of 1,2,4-triazines by interaction of α-bromoacetophenones and arylhydrazides

Abstract

On interacting α-bromoacetophenones with aromatic carboxylic acid hydrazides, the formation of two reaction products was observed in certain cases, the expected 1,2,4-triazine and the phenylglyoxal dihydrazone as an unexpected product. The effect of substituents in the initial substrates and of the conditions of carrying out the synthesis on the direction of the reaction have been studied. © 2013 Springer Science+Business Media New York.