An efficient and convenient approach to synthesis of tetrahydrobenzo[b] pyran derivatives using tetrabutylammonium bromide as catalyst

Abstract

An efficient and convenient approach to the synthesis of 2-amino-3- cyano-4-aryl-7,7-dimethyl-5-oxo-4H-5, 6, 7, 8- tetrahydro benzo[b]pyran derivatives using tetrabutylammonium bromide (TBABr) as the catalyst is described. This method provides several advantages such as neutral conditions, high yields and simple work procedure.