Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (4): 706-710.DOI: 10.1016/S1872-2067(11)60377-X

• Research papers • Previous Articles     Next Articles

Sulfonated Carbon Catalyzed Biginelli Reaction for One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones and -thiones

Maryam MOGHADDAS1, Abolghasem DAVOODNIA1,*, Majid M. HERAVI2, Niloofar TAVAKOLI-HOSEINI1   

  1. 1Department of Chemistry, Mashhad Branch, Islamic Azad University, Mashhad, Iran; 2Department of Chemistry, School of Sciences, Alzahra University, Vanak, Tehran, Iran
  • Received:2011-10-19 Revised:2012-02-19 Online:2012-04-13 Published:2015-09-09

Abstract: A sulfonated carbon material was shown to be a highly efficient, eco-friendly, and recyclable solid acid catalyst for the Biginelli reaction of β-ketoester, aldehyde, and urea or thiourea under solvent-free conditions. It gave 3,4-dihydropyrimidin-2(1H)-ones and -thiones in good to excellent yields. This method has the advantages of a simple procedure with easy work-up, short reaction time, and high yields. The catalyst can be recycled after a simple work-up and was reused four times without substantial reduction in activity.

Key words: sulfonated carbon, solid acid, Biginelli reaction, heterogeneous catalysis, solvent-free condition