A multi-component reaction for the synthesis of N-substituted furo[3,4-b]quinoline derivatives under microwave irradiation

A series of new N-substituted furo[3,4-b]quinoline derivatives were synthesized via a three-component reaction of an aldehyde, an enamineone and tetronic acid in glacial acetic acid under microwave irradiation without a catalyst. This new protocol has the advantages of shorter time, higher yields, lower cost and broader substrate scope, as well as easier operation. (c) 2006 Elsevier Ltd. All rights reserved.