Abstract
A cellulose-based nanocomposite with highly loaded Fe3O4 nanoparticles was prepared and characterized by Fourier transform infrared spectroscopy (FT-IR) spectra, scanning electron microscopy (SEM) images, energy-dispersive X-ray spectroscopy (EDX) spectra and X-ray diffraction (XRD) measurements. Its catalytic activity was investigated in the condensation reaction between o-phenylenediamines and ketones that produced benzodiazepines in good to excellent yields under mild reaction conditions. A good correlation between the amount of surface acid sites and the morphology of the catalyst and its catalytic activity was observed. The nanocatalyst could be recycled and reused without significant loss of its catalytic activity.
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