Synthesis of the Picolylamine copper complex immobilized on the Core-Shell Fe₃O₄ nanomagnetic particles and its application in the organic transformation

چکیده مقاله

In this current study, the picolylamine copper complex immobilized on the core–shell Fe₃O₄ nanomagnetic particles [Fe₃O₄@SiO₂@GP/Picolylamine-Cu(II)] has been easily prepared via a multistep procedure from the reaction between 2-picolylamine and GPTMS to give GP/picolylamine. Then, the as-prepared GP/picolylamine materials can be immobilized with core–shell Fe₃O₄ nanomagnetic particles to stabilize the Cu. The as-synthesized nanocatalyst was fully characterized by a variety of analyses such as FT-IR, TGA, XPS, XRD, VSM, FE-SEM, TEM, EDX, WDX and BET. Furthermore, the activity of them has been successfully performed in the synthesis of 2-amino-4H-benzo[b]pyran derivatives via various aldehydes, malononitrile and dimedone and 2-(aryl)methylenemalononitrile derivatives via various aldehydes and malononitrile, and the desired products were obtained within high yields and short reaction time. In addition, the as-synthesized nanocatalyst can be recovered and reused 7 cycles with little loss in activity. Also, Cu leaching from as-synthesized nanocatalyst is very negligible for these reactions. © 2022 Elsevier B.V.