one-pot solvent-free synthesis of pyranonaphthoquinone-fused spirooxindoles catalyzed by sba-il

In this research, ionic liquid modified sba-15 mesoporous material (sba-il) as a recyclable, heterogeneous catalyst efficiently catalyzed the synthesis of pyranonaphthoquinone-fused spirooxindoles through the one-pot three-component reaction of isatin derivatives, activated methylene reagents, and 2-hydroxy-1,4-naphthoquinone. the reactions were performed under microwave irradiation and solvent-free conditions. the synthesized sba-il was characterized by sem, ft-ir, nitrogen adsorption-desorption, and thermogravimetric analyses. excellent chemical yield, short reaction time, mild reaction condition, easy workup procedures, and reusability of catalyst are noteworthy advantages of this protocol.