2-Arylhydrazonopropanals as building blocks in heterocyclic chemistry: Microwave assisted condensation of 2-aryl-hydrazonopropanals with amines and active methylene reagents

Abstract

Utilization of 2-arylhydrazonopropanals for the synthesis of 2-arylhydrazonoimino propanones, 1,2,4-trizolo[4,3-a]pyrimidines, pyridopyridazine hydrazones, 3-oxaloalkanonitriles and 1,2,3-trizole derivatives by conventional heating and under microwave irradiation is described. Structural assignments are based on spectroscopic data and confirmed in some cases by X-ray crystallography.