Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (7): 1180-1184.DOI: 10.1016/S1872-2067(10)60252-5

• Research papers • Previous Articles     Next Articles

Silica Sulfuric Acid: An Efficient Heterogeneous Catalyst for the One-Pot Synthesis of 1,4-Dihydropyridines under Mild and Solvent-Free Conditions

Bandita DATTA, M. Afzal PASHA*   

  1. Department of Studies in Chemistry, Central College Campus, Bangalore University, Bengaluru 560001, India
  • Received:2011-04-28 Revised:2011-05-31 Online:2011-07-18 Published:2014-11-28

Abstract: A series of 1,4-dihydropyridines have been prepared by a one-pot condensation of aldehydes, ethyl acetoacetate, and ammonium acetate in the presence of a heterogeneous catalyst silica sulfuric acid at room temperature under solvent-free condition. This new protocol has the advantage of short reaction time and excellent yields, and is an environmentally benign route to the synthesis of 1,4-dihydropyridines.

Key words: aldehyde, ethyl acetoacetate, ammonium acetate, silica sulfuric acid, 1,4-dihydropyridine