A magnetic nanoparticle supported efficiently catalyzes for condensation 2-aminobenzamide with aldehydes to afford the corresponding 2,3-dihydroquinazolin-4(1H)-one derivatives successfully in high yield. The reactions were carried out in ethanol under reflux conditions. The protocol proves to be efficient and versatile benign in terms of very easy work-up and reused seven times without significant loss of catalytic activity. The heterogeneous catalyst was characterized by FT-IR spectroscopy, thermogravimetric (TGA) analysis, powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscope (TEM). (C) 2014 Elsevier B.V. All rights reserved.