| نویسندگان | عبد الحمید بامنیری-سارا فولادگر |
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| نشریه | RSC ADV |
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| تاریخ انتشار | 2015-0-01 |
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| نمایه نشریه | ISI |
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چکیده مقاله
A novel type of green heterogeneous solid acid was prepared by the immobilization of SnCl4 on the surface
of Fe3O4@SiO2 (Fe3O4@SiO2–SnCl4) and characterized by Fourier transform-infrared spectroscopy (FT-IR),
X-ray diffraction (XRD), vibrating sample magnetometer (VSM), field emission-scanning electron
microscopy (FE-SEM), energy dispersive X-ray (EDX) analysis, N2 adsorption–desorption (BET) study and
transmission electron microscopy (TEM). The activity of this solid acid was investigated via the synthesis
of 1,4-dihydropyridine derivatives using a three or four component coupling reaction between an
aldehyde, 1,3-dicarbonyl compound, and ammonium acetate under ultrasonic irradiation, which yielded
excellent results with easy work-up in a short time. 1,4-dihydropyridine derivatives were characterized by
FT-IR and 1HNMR spectroscopy.
