Journal
APPLIED ORGANOMETALLIC CHEMISTRY
Volume 31, Issue 5, Pages -Publisher
WILEY
DOI: 10.1002/aoc.3598
Keywords
2-amino-4; 6-diphenylnicotinonitriles; anomeric-based oxidation; Fe3O4@TiO2@O2PO2(CH2)NHSO3H; nanomagnetic heterogeneous catalyst; solvent-free and benign conditions
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Funding
- Bu-Ali Sina University
- Iran National Science Foundation (INSF) [BN093]
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A new, green and reusable nanomagnetic heterogeneous catalyst, namely Fe3O4@TiO2@O2PO2(CH2)NHSO3H, was synthesized and fully characterized using suitable techniques such as infrared spectroscopy, X-ray diffraction, scanning and transmission electron microscopies, thermogravimetry, vibrating sample magnetometry and energy-dispersive X-ray spectroscopy. The applicability of the constructed heterogeneous core-shell catalyst as a promoter was successfully explored for the synthesis of 2-amino-4,6-diphenylnicotinonitrile derivatives upon the reaction of a good range of aromatic aldehydes, acetophenone derivatives, malononitrile and ammonium acetate. The desired products were obtained with good to high yields in short reaction times under solvent-free conditions. The suggested mechanism offers an anomeric-based oxidation route to the products in the final step of the synthetic pathway.
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