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Title
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Immobilized Cu(II) Schiff base complex supported on Fe3O4 magnetic nanoparticles: A highly efficient and reusable new catalyst for the synthesis of pyranopyridine derivatives
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Type
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JournalPaper
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Keywords
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acac‐2ATP Schiff base–Cu(II) complex, Fe3O4‐immobilized Schiff base copper complex, nanomagnetic Fe3O4, nanoparticle, pyranopyridine
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Abstract
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A new copper(II) Schiff base complex immobilized on silica‐coated nanomagnetic Fe3O4 was synthesized from acetylacetonate (acac) and 2‐ aminothiophenol (ATP). The newly synthesized nanocatalyst, Fe3O4@SiO2‐ acac‐2ATP‐Cu(II), was structurally characterized using several analytical techniques. The catalytic activity of the Fe3O4@SiO2‐acac‐2ATP‐Cu(II) nanoparticles was investigated for the synthesis of pyrano[2,3‐b]pyridine derivatives from the one‐pot three‐component reaction of aldehydes, malononitrile and 3‐cyano‐6‐hydroxy‐4‐methylpyridin‐2(1H)‐one. A high catalytic performance was exhibited by this nanocatalyst under solvent‐free conditions and excellent yields of the products were achieved in reasonably short reaction times. The nanoparticles could be easily separated from the reaction mixture simply by magnetic decantation and reused for several consecutive runs without significant loss of catalytic activity.
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Researchers
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(Third Researcher), (Second Researcher), Davood Azarifar (First Researcher)
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