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۱Nano–TiCl4.SiO2: A Versatile and Efficient Catalyst for Synthesis of 14–aryl or alkyl–14H–dibenzo[a,j]xanthenes
نویسنده(ها): ، ،
اطلاعات انتشار: Journal of Nano Structures، سوم،شماره۴، ۲۰۱۳، سال
تعداد صفحات: ۶
Nano–silica supported titanium tetrachloride (TiCl4.SiO2) was prepared and used as an acid catalyst for the 14–aryl or alkyl–14Hdibenzo[ a,,j]xanthenesreaction under solvent–free conditions. Compared to the classical 14–aryl or alkyl–14Hdibenzo[ a,j]xanthenesreaction conditions, this method consistently has the advantage of excellent yields, mild reaction conditions, ease of workup, survival of different functional groups and short reaction times.

۲BF3\nano–γ–Al2O3 Promoted Knoevenagel Condensation at Room Temperature
اطلاعات انتشار: Journal of Nano Structures، پنجم،شماره۴، ۲۰۱۵، سال
تعداد صفحات: ۷
The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3\nano–γ–Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X–ray diffraction (XRD), fourier transform infrared spectroscopy (FT–IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy–dispersive X–ray spectroscopy (EDS).

۳Nano SbCl5.SiO2: An efficient and heterogeneous catalyst for the synthesis of 3,4–dihydropyrimidin–2(1H)–one (thione)derivatives under solvent–free conditions
نویسنده(ها): ، ،
اطلاعات انتشار: Scientia Iranica، بيست و دوم،شماره۶، ۲۰۱۵، سال
تعداد صفحات: ۹
A green approach for efficient and rapid synthesis of biologically active substituted 3,4–dihydropyrimidin–2(1H)–one(thione) derivatives using nano SbCl5.SiO2as a heterogeneous catalyst under solvent–free conditions is reported. The catalyst was characterized by FT–IR, XRD, SEM, TEM and TG–DTG analysis. Compared to the classical reactions, this method consistently has advantages of excellent yields, simple operation, short reaction time, and the avoidance of the use of organic solvents and eco–friendly protocol.
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