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Article info. : 2006; 3(1) (pp 73~80)

 

Oxidation of 1,4-Dihydropyridines under Mild and Heterogeneous Conditions Using Solid Acids

M.A. Zolfigol a,*, M. Bagherzadehb, K. Niknamc,*, F. Shirinid, I. Mohammadpoor-Baltorke, A. Ghorbani Choghamarania and M. Baghbanzadeha

aChemistry Department, College of Science, Bu-Ali Sina University, Hamadan 65174, Iran

bCollege of Chemistry, Sharif University of Technology, Tehran, Iran

cChemistry Department, Faculty of Sciences, Persian Gulf University, Bushehr 75168 Iran

dChemistry Department, College of Science, Guilan University, Rasht, Iran

eChemistry Department, College of Science, Isfahan University, Isfahan, Iran

(Received 12 November 2005, Accepted 4 January 2006)

A combination of solid acids, including Oxone, HIO3, H5IO6, and polystyrenesulfonic acid and sodium nitrite, in the presence of wet SiO2 were used as an effective oxidizing agents for the oxidation of dihydropyridines to their corresponding pyridine derivatives under mild and heterogeneous conditions in good to excellent yields.

Keywords: Oxidation, 1,4-Dihydropyridines, Pyridines, Solid acids

 

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