Synthesis and Characterization of Pd(0)-SMT-MCM-41 and its Application in the Amination of Aryl Halides and Synthesis of 2,3-Dihydroquinazolin-4(1H)-Ones as Efficient and Recyclable Nanostructural Catalyst

Palladium S-methylisothiourea [Pd(0)-SMT] has been grafted at the surface of functionalized mesoporous silica MCM-41 and used as an efficient and reusable heterogeneous nanocatalyst system for amination of various aryl halides and the one-pot synthesis of 2,3-dihydroquinazolin-4(1H)-one derivatives. The present methodology offers several advantages such as simplicity of procedure, easy isolation of the products and reused for several consecutive runs without significant loss of their catalytic efficiency. The characteristic structural features of this new catalyst was determined by various physico-chemical techniques such as FT-IR spectroscopy, XRD, SEM/EDS, ICP, TGA, BET surface area measurement and elemental analysis.