Introduction of Fe3O4@SiO2–ZrCl2-MNPs for the efficient promotion of some multi-component reactions under solvent-free conditions
Abstract
In this work, the preparation and characterization of Fe3O4@SiO2–ZrCl2-MNPs as novel nano magnetic reagents is reported. After preparation, the promoting ability of this catalyst in the synthesis of tetrahydrobenzimidazo [2,1-b]quinazolin-1(2H)-ones and 2H-indazolo[2,1-b]phthalazine-triones is studied. The most important features of the present protocol are the easy preparation of the catalyst, mild reaction conditions, short reaction times, high yields and recyclability of the catalyst for at least four runs.