Green Synthesis of 6‐Aryl‐5,6‐dihydrobenzo[4,5]imidazo[1,2‐<i>c</i>]quinazoline Derivatives in Ionic Liquid under Catalyst‐free Conditions

Abstract

Using ionic liquids as green media, a series of 6‐arylbenzo[4,5]imidazo[1,2‐ c ]quinazoline derivatives is synthesized via a reaction of 2‐(1 H ‐benzo[ d ]imidazol‐2‐yl)aniline and benzaldehydes in the air. While the intermediate products of 6‐aryl‐5,6‐dihydrobenzo[4,5]imidazo[1,2‐ c ]quinazolines were obtained in high yields at the same conditions under nitrogen protection.