Abstract

SIMPLE AND EFFICIENT PROTOCOL FOR THE SYNTHESIS OF 1, 2, 4, 5-TETRASUBSTITUTED IMIDAZOLES PROMOTED BY BISMUTH (III) BROMIDE

Venkata Reddy H., Rajendraprasad K. J., Shekar H. S. and Manjula Krishnappa*

Abstract

A simple and efficient protocol has been developed for the synthesis of 1, 2, 4, 5-tetrasubstituted imidazoles via four-component using like 1,2-diketones, aryl aldehydes, aryl amines and ammonium acetate in the presence of Bismuth (III) bromide as a promoter and ethanol as a solvent and stirred at 80oC for 30 min. The reaction proceeded in short period of time with high yields using low toxicity bismuth compound.

Keywords: Bismuth (III) bromide (BiBr3), 1, 2, 4, 5- tetrasubstituted imidazoles, 1,2-diketones, aryl aldehydes, aryl amines and ammonium acetate.