A mild, efficient, and environmentally friendly synthesis of N,N′-arylidene bisamides using B(HSO4)3 under solvent-free conditions

Abstract

A green, efficient, and rapid procedure for the synthesis of N,N′-arylidene bisamide derivatives has been developed by one-pot condensation of aldehydes and amides in the presence of tris(hydrogensulfato)boron as a highly effective heterogeneous catalyst under solvent-free conditions at 100 °C. Various aromatic aldehydes, acetamide or benzamide were used in the reaction, and in all cases the desired products were synthesised successfully. This method has the advantages of high yields, a clean reaction, an environmental friendly procedure, easy workup, simple methodology, and short reaction times. .