Fe3O4/SiO2/(CH2)3N+Me3Br3â coreâshell nanoparticles: An efficient catalyst for the synthesis of functionalized 5-oxo-hexahydroquinolines

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  • Azita Farrokhi*1,
  • Issa Yavari2,
  • Keivan Ghodrati3,
  1. Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran.
  2. Department of Chemistry, Tarbiat Modares University, PO Box 14115-175, Tehran, Iran.
  3. Department of Chemistry, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran.

Published in Issue 2024-02-03

How to Cite

Farrokhi, A., Yavari, I., & Ghodrati, K. (2024). Fe3O4/SiO2/(CH2)3N+Me3Br3– core–shell nanoparticles: An efficient catalyst for the synthesis of functionalized 5-oxo-hexahydroquinolines. Iranian Journal of Catalysis, 8(1). https://oiccpress.com/ijc/article/view/3989

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Abstract

The four-component Hantzsch condensation reaction of dimedone, ethyl acetoacetate, ammonium acetate, and various aromatic and aliphatic aldehydes in the presence of catalytic amount of a magnetic nanoparticle-supported tribromide, as a green catalyst, under solventâfree conditions at 80 °C affords functionalized 5-oxo-hexahydroquinolines in good to excellent yields. The magnetic Fe3O4-SiO2-(CH2)3N+Me3Br3â, was characterized by infrared spectroscopy (FT-IR), X-ray diffraction (XRD) spectroscopy, transmission electron microscope (TEM) and vibrating sample magnetometer (VSM). The method offers several advantages including high yields, short reaction time, simple work-up procedure and catalyst reusability for several runs. The catalyst could be readily separated by using a magnetic force and reused six times without any significant loss of catalytic activity.

Keywords

  • 5-Oxo-hexahydroquinolines. Solvent-free,
  • Hantzsch condensation,
  • Heterogeneous catalysis,
  • Magnetically retrievable,
  • Nanohybrid
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