Recently, conjugated nanomaterials made of a nano-metal oxides core and polymers have emerged as a promising candidate in new generation catalysis. Herein, we report a novel heterogeneous catalyst by immobilizing poly triazinethiourea-sulfonamide (PTTSA) on the surface of the ZnÀ AlÀ Cu core. In this sense, the sulfonated catalyst was obtained via simple sulfonation using chlorosulfonic acid (ZnÀ AlÀ Cu@PTTSA-SO 3 H). The post-synthetically modified nanomaterial was characterized using FT-IR, FE-SEM, TGA, EDX, XRD, and WDX. Regarding the catalytic exploration, we aimed at synthesizing furano and pyrano pyrimidinone derivatives via a one-pot three-component reaction of urea/thiourea, 2,3dihydrofuran/3,4-dihydro-2H-pyran, and aldehydes with a variety of substrates. The catalyst is highly reusable and efficient, especially in terms of time and yield of the desired product.
In order to investigate the role of silica template, polymers and nickel nanoparticles on the reduction of aldehydes/ketones, a novel porous triazine-thiourea-sulfonamide polymeric organic support (TTSA) was prepared via in-situ polymerization of melamine (1,3,5-triazine-2,4,6-triamine), thiourea and benzene-1,3-disulfonyl chloride in the presence of silica nanoparticles as a template led to the synthesize silica TTSA nanocomposite. Next, after removal of the template, the nanocomposite was transformed into mesoporous poly triazine-thiourea-sulfonamide. Ni nanoparticles (Ni NPs) were then decorated on the designed mesoporous polymer support and the resulting TTSA@Ni NPs nanospheres were employed as heterogeneous catalyst in the construction of alchohols from reduction of aldehydes/ketones using formic acid/triethyl amine as a reducing agent in water as solvent. The catalyst is low-cost, non-toxic, and can be reused for several catalytic cycles without decreasing the activity.
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