The preparation of quinazolinones has been developed by the condensation of aromatic aldehydes and 2-aminobenzamide in the presence of transition metal-CNTs nanocomposites as novel and recyclable catalyst under microwave and solvent-free conditions. This methodology provides a high speed path for the green and mild synthesis of 2-aryl-2,3-dihydroquinazolin-4(1H)-ones with high structural diversity. The present methodology has advantages such as high activity and reusability of catalysts, heterogeneous nature of catalysts, no use of hazardous organic solvents and green conditions. (C) 2014 Elsevier B.V. All rights reserved.