A novel Biginelli-like cyclocondensation reaction is efficiently catalyzed by MnO2-CNT nanocomposites as a new catalyst under microwave irradiation and solvent-free conditions in excellent yields. The major advantages of the present method are high yields, short reaction times and solvent-free reaction conditions, reducing reaction steps and purification of products by non-chromatographic methods. The activity, recovery and reusability of the catalyst are found to be good. (C) 2013 Elsevier B.V. All rights reserved.