An efficient synthesis of 4-aryl-7-benzylidene-hexahydro-2H-cyclopenta[d] pyrimidin-2-ones/thiones catalyzed by p-dodecylbenzenesulfonic acid

PDF HTML
  • Krishnamoorthy Aswin1,
  • Majid Ghashang2,
  • Sheik Mansoor3,
  1. Research Department of Chemistry, C. Abdul Hakeem College, Melvisharam – 632 509, India
  2. Department of Chemistry, Najafabad Branch, Islamic Azad University, P.O. Box: 517; Najafabad, Iran
  3. Bio active Organic Molecule Synthetic Unit, Research Department of Chemistry, Melvisharam - India

Published in Issue 2024-02-03

How to Cite

Aswin, K., Ghashang, M., & Mansoor, S. (2024). An efficient synthesis of 4-aryl-7-benzylidene-hexahydro-2H-cyclopenta[d] pyrimidin-2-ones/thiones catalyzed by p-dodecylbenzenesulfonic acid. Iranian Journal of Catalysis, 5(2). https://oiccpress.com/ijc/article/view/3842

PDF views: 182

HTML views: 5

Abstract

A new and efficient method has been developed for the synthesis of 4-aryl-7-benzylidene-1,3,4,5,6,7-hexahydro-2H-cyclopenta[d]pyrimidin-2-ones through Biginelli-like reaction of cyclopentanone, with urea/thiourea and aromatic aldehyde employing p-dodecylbenzenesulfonic acid (DBSA) as a recyclable catalyst under solvent-free condition. The recovered catalyst was recycled for further runs. The product formation takes place via a cross-aldol condensation of benzaldehyde with cyclopentanone in the presence of DBSA to produce benzylidene intermediate and subsequent Michael addition. The present approach offers the advantages of short reaction time, mild reaction conditions, high yields and convenient operation. All the products were obtained in good to excellent yields and the structures of the synthesized compounds were established by advanced spectroscopic data.

Keywords

  • Biginelli reaction,
  • Cyclopenta[d]pyrimidin-2-one,
  • One-pot synthesis,
  • p-Dodecylbenzenesulfonic acid
PDF HTML