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Title
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Fe3O4@TiO2@O2PO2(CH2)NHSO3H as a novel nanomagnetic catalyst: Application to the preparation of 2‐amino‐4,6‐ diphenylnicotinonitriles via anomeric‐based oxidation
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Type
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JournalPaper
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Keywords
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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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Abstract
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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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Researchers
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Meysam Yarie (Second Researcher), ma z (First Researcher)
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