In the present work, we have planned a new magnetically recoverable nanocatalyst. The obtained nanocatalyst designated as Fe3O4@SiO2@DOPisatin-Ni(II) was characterized by FTIR, XRD, SEM, EDAX, VSM, AAS and TGA techniques. It was found that Fe3O4@SiO2@DOPisatin-Ni(II) successfully catalyses the synthesis of 2,3-dihydroquinazolin-4(1H)-ones, polyhydroquinoline and 5-substituted 1H-tetrazoles in solvent free condition and PEG as a green solvent.
