Silica immobilized nickel complex: An efficient and reusable catalyst for microwave-assisted one-pot synthesis of dihydropyrimidinones

► Synthesis of silica immobilized nickel complex. ► Characterization of catalyst by CHN, BET,AAS, FTIR and 13C CPMAS NMR. ► Greener method for synthesis of DHPM's under microwave radiations and solvent free condition. ► Recyclability of catalyst without significant decrease in catalytic activity.