SnCl4-functionalized nano-Fe3O4 encapsulated-silica particles as a novel heterogeneous solid acid for the synthesis of 1,4-dihydropyridine derivatives
作者： Abdolhamid Bamoniri , Sara Fouladgar
DOI: 10.1039/C5RA12734C
关键词:
摘要: A novel type of green heterogeneous solid acid was prepared by the immobilization SnCl4 on surface Fe3O4@SiO2 (Fe3O4@SiO2–SnCl4) and characterized Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), vibrating sample magnetometer (VSM), field emission-scanning electron microscopy (FE-SEM), energy dispersive (EDX) analysis, N2 adsorption–desorption (BET) study transmission (TEM). The activity this investigated via synthesis 1,4-dihydropyridine derivatives using a three or four component coupling reaction between an aldehyde, 1,3-dicarbonyl compound, ammonium acetate under ultrasonic irradiation, which yielded excellent results with easy work-up in short time. were FT-IR 1HNMR spectroscopy.
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