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<p>A novel copper-based magnetic nanocatalyst, MNP@Im–Cu, was successfully synthesized via a six-step procedure. Its structural evolution, magnetic behavior, and thermal stability were systematically characterized using Fourier-transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis/differential thermal analysis (TGA/DTA), vibrating-sample magnetometry (VSM), inductively coupled plasma analysis (ICP), and X-ray diffraction (XRD). These analyses confirmed successful surface functionalization, uniform core–shell morphology, elemental homogeneity, magnetic properties, and thermal robustness. The catalytic efficiency of this multifunctional nanocatalyst was demonstrated in the one-pot, four-component synthesis of pharmaceutically relevant heterocycles: hexahydroquinolines (HHQs), 2-amino-3-cyanopyridines (ACPs), and pyranopyrazoles (PYPYs). Reactions proceeded under solvent-free conditions using readily available starting materials, affording the desired products in high to excellent yields with notably short reaction times. The catalyst exhibited excellent reusability and chemo-selectivity, underscoring its potential as a sustainable and efficient platform for multi-component heterocycle synthesis.</p>

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A novel copper-based magnetic nano catalyst for the synthesis of hexahydroquinolines, aminocyanopyridines, and pyranopyrazoles

  • 期刊论文

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  • 发表日期：

    2026年5月21日

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  • Arezo Monem,
  • Davood Habibi

摘要

A novel copper-based magnetic nanocatalyst, MNP@Im–Cu, was successfully synthesized via a six-step procedure. Its structural evolution, magnetic behavior, and thermal stability were systematically characterized using Fourier-transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), thermogravimetric analysis/differential thermal analysis (TGA/DTA), vibrating-sample magnetometry (VSM), inductively coupled plasma analysis (ICP), and X-ray diffraction (XRD). These analyses confirmed successful surface functionalization, uniform core–shell morphology, elemental homogeneity, magnetic properties, and thermal robustness. The catalytic efficiency of this multifunctional nanocatalyst was demonstrated in the one-pot, four-component synthesis of pharmaceutically relevant heterocycles: hexahydroquinolines (HHQs), 2-amino-3-cyanopyridines (ACPs), and pyranopyrazoles (PYPYs). Reactions proceeded under solvent-free conditions using readily available starting materials, affording the desired products in high to excellent yields with notably short reaction times. The catalyst exhibited excellent reusability and chemo-selectivity, underscoring its potential as a sustainable and efficient platform for multi-component heterocycle synthesis.