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چکیده
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Sulfamic acid-functionalized Fe3-xTixO4 nanoparticles (Fe3-xTixO4- SO3H NPs) were fabricated as novel acidic magnetic nanocatalyst by the reaction of Fe3-xTixO4 magnetic nanoparticles (MNPs) with 3-chloropropyltrimethoxysilyl urea (TMSPU) followed by functionalization with chlorosulfonic acid. The structure of the synthesized nanocatalyst was studied using different methods including, Fourier-transform infrared (FT-IR), field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis (TGA), vibrating sample magnetometer (VSM), and dynamic light scattering (DLS). The potential catalytic ability of the synthesized MNPs was studied in one-pot fourcomponent condensation reaction between aromatic aldehydes, dimedone, alkyl acetoacetates and ammonium acetate in order to synthesis of hexahydroquinoline derivatives. It was witnessed that the reactions proceeded smoothly under solvent-free condition with high yields of corresponding hexahydroquinolines.
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