nanocomposite catalyzed procedure for the synthesis of 2-amino-6-aryl-5,6-dihydro-4(3H)-pyrimidinones from a one-pot threecomponent coupling reaction of Meldrum’s acid, aromatic aldehydes, and guanidine nitrate with high yields under solvent-free conditions. This new protocol has revealed several advantages such as recyclability of catalyst, short reaction times, high to excellent yields of products