ABSTRACT
Silica-supported magnetic nanoparticles were simply prepared in high yields and characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy analyses. Then, Fe3O4@SiO2 core-shell was used as a reusable and efficient heterogeneous nanocatalyst in a one-pot three-component condensation of various aromatic aldehydes, malononitrile, and 1,3-dicarbonyl compounds to yield 2-amino-4-aryl-5-oxo-5,6,7,8-tetrahydro-4H-chromene-3-carbonitrile derivatives as worthy structures under mild reaction conditions and easy workup procedure.
Funding
The authors gratefully acknowledge the partial financial support from the Research Council of the Iran University of Science and Technology.