Silica-bonded n-propyldiethylenetriamine sulfamic acid as a recyclable solid acid catalyst for the synthesis of coumarin and biscoumarin derivatives

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  • Khodabakhsh Niknam1,
  • Seyed Ahmad Sajadi2,
  • Roghayeh Hosseini2,
  • Mojtaba Baghernejad3,
  1. Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran.
  2. Department of Chemistry, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran.
  3. Young and Reasearcers Elite, Gachsaran Branch, Islamic Azad University, Gachsaran, Iran

Published in Issue 2024-02-03

How to Cite

Niknam, K., Sajadi, S. A., Hosseini, R., & Baghernejad, M. (2024). Silica-bonded n-propyldiethylenetriamine sulfamic acid as a recyclable solid acid catalyst for the synthesis of coumarin and biscoumarin derivatives. Iranian Journal of Catalysis, 4(3). https://oiccpress.com/ijc/article/view/3806

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Abstract

Silica-bonded n-propyldiethylenetriamine sulfamic acid (SBPDSA) was found as an efficient solid acid for the synthesis of coumarins. Coumarin derivatives were obtained via the Pechmann condensation reaction of phenols and β-keto-esters at 80 oC under solvent-free conditions. Also, biscoumarins were obtained via the condensation of aldehydes and 4-hydroxycoumarin in water at reflux conditions. The heterogeneous solid acid showed much the same efficiency when used in consecutive reaction runs.

Keywords

  • Aromatic aldehydes,
  • Biscoumarins,
  • Catalyst,
  • Coumarins,
  • Pechmann reaction,
  • Silica-bonded n-propyldiethylenetriamine sulfamic acid,
  • Solid acids
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