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A simple, green and cost-effective protocol was achieved for the synthesis of tri/tetrasubstituted-1H-imidazoles and 2,3-dihydroquinazolin-4(1H)-ones using nano aluminium nitride. The reaction was carried out under catalyst-free conditions and the products were isolated in good to excellent yield.

MCM-48 mesoporous synthesized and grafted with aminopropyl triethoxysilane (APTES) and subsequently reacted by isatin to obtain the imine of MCM-48. Addition of ZrOCl 2 Á8H 2 O, leading to form the complex of Zr(IV)/isatin-MCM-48 as new Schiff base complex of zirconium(IV)-modified-MCM-48. The synthesized catalyst was characterized by XRD, TGA, FT-IR and BET. The resulting catalyst was efficient for selective oxidation of sulfides to sulfoxides and oxidation of thiols to disulfides with hydrogen peroxide. In this method isolation and reusability of catalyst have been investigated Graphical Abstract MCM-48 O O O O

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An efficient one‐pot method for synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones and tri/tetra substituted‐1H‐imidazoles has been accomplished in the presence of catalytic amounts of Cu(I)‐1,3‐dimethylbarbituric acid modified SBA‐15 as heterogeneous catalyst with good to excellent yields. The catalyst is reusable and can be applied several times without any decrease in product yield. The synthesized catalyst was characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD), energy dispersive X‐ray spectroscopy (EDS), thermal gravimetric analysis (TGA), N2 adsorption/desorption isotherms (BET), Fourier transform infrared spectroscopy (FT‐IR) and atomic absorption spectroscopy (AAS).

Green Synthesis of Tri/Tetrasubstituted 1H-Imidazoles and 2,3-Dihydroquinazolin-4(1H)-ones Using Nano Aluminum Nitride as Solid Source of Ammonia. -A simple, green, and cost-effective protocol is achieved for the synthesis of tri-and tetrasubstituted imidazoles and pyrimidine derivatives using nano aluminium nitride as a solid source of ammonia. The reaction proceeds under catalyst-free conditions and the products are isolated in good yields. -(HAJJAMI*, M.; GHORBANI-CHOGHAMARANI, A.; YOUSOFVAND, Z.; NOROUZI, M.;