Preparation and Characterization of Hollow MgO/SiO2 Nanocomposites and Using as Reusable Catalyst for Synthesis of 1 H-isochromenes

Abstract

In the present study, a hollow MgO/SiO2 nanocatalyst with high alkaline properties was prepared. This heterogeneous catalyst was prepared in several steps to create a great active area and decrease the density of the catalyst. The alkaline hollow catalyst framework was applied for the reaction of cyclohexanone, malononitrile and benzaldehyde for synthesis of 1 H-isocromene therough the Michael addition and aldol condensation reaction at room temperature. In this method, all of the done reactions were excellent in the yields of products and reaction times. At the end of the reaction, the nanocatalyst separated by simple filtration and reuse in several runs elsewhere.