Preparation and Modification of Magnetic Mesoporous Silica-Alumina Composites as Green Catalysts for the Synthesis of Some Indeno[1,2-b]Indole-9,10-Dione Derivatives in Water Media

In this work, magnetic mesoporous silica-alumina composites (MSA) containing three metal oxides(MSA/MO) with different molar ratio of Si to Al (0.5, 1 and 2) were synthesized. The efficiency prepared catalysts was compared modified natural zeolite (ferrierite) in the multicomponent synthesis indeno[1,2-b]indole-9,10-diones. Immobilization ZnO, CuO NiO on increased their Lewis acidic sites improved catalytic activity. Also property designed enhanced capability easy separation. Among mentioned composites, catalyst S/A = 2 show best indeno[1,2-b]indole-9,10-diones under thermal conditions water as green solvent. FT-IR, XRD, FE-SEM, EDX, elemental mapping, BET VSM techniques used characterize composites. synthesized products obtained high excellent yields structures confirmed by 1HNMR, 13CNMR FT-IR spectroscopy.