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Abstract: An efficient and expeditious microwave-assisted synthesis of 4-azafluorenone derivatives and related compounds is accomplished via a multi-component reaction of an aldehyde, 1,3-indanedione, an arone and ammonium acetate. It is an efficient and promising synthetic strategy to build indenopyridine skeleton. [Copyright &y& Elsevier]

Abstract: 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. [Copyright &y& Elsevier]