Employing a hydrophobic-bentonite as a highly efficient and versatile catalyst for a green one-pot and rapid synthesis of 4H-benzo-[b]-pyran derivatives

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  • Mohammad Ebrahim Sedaghat*1,
  • Faranak Farhadi1,
  • Mohammad Reza Nazarifar1,
  • Rezvan Sheikhi Kamareji1,
  1. Department of Chemistry, Lamerd Branch, Islamic Azad University, Lamerd, Iran.

Published in Issue 2024-02-03

How to Cite

Sedaghat, M. E., Farhadi, F., Nazarifar, M. R., & Sheikhi Kamareji, R. (2024). Employing a hydrophobic-bentonite as a highly efficient and versatile catalyst for a green one-pot and rapid synthesis of 4H-benzo-[b]-pyran derivatives. Iranian Journal of Catalysis, 8(4). https://oiccpress.com/ijc/article/view/4020

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Abstract

A hydrophobic-bentonite catalyst (cetyltrimethyl ammonium bromide-bentonite) has been used as a very mild, neutral, eco-friendly, reusable, non-toxic, low-cost and easily available catalyst. It was prepared by replacing the exchangeable Na+ cations of a homoionic Naâbentonite with cetyltrimethyl ammonium bromide (CTMAB) cations. The catalyst was characterized by XRD, BET and SEM. The BET data and XRD patterns showed that the surfactant ions enter the interlayer space of catalyst. In order to study the catalytic properties, we carried out a one-pot practical, efficient and green multicomponent synthesis of 4H-benzo-[b]-pyran derivatives in terms of high yield, simple experimental procedure, low reaction time and simple work-up.

Keywords

  • Green chemistry,
  • Hydrophobic-bentonite,
  • Multi-component reactions,
  • One-pot synthesis,
  • Pyran derivatives
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