InCl3 Promoted Synthesis of Pyrano[3,2-h]quinolines via Microwave Irradiation

An efficient and economical method has been developed for the synthesis of pyrano[3,2-h]quinolines via an indium trichloride-catalyzed one-pot three-component reaction of 8-hydroxyquinoline with aromatic aldehydes and malononitrile/ethyl cyanoacetate under microwave irradiation.