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Note | Regular issue | Vol 65, No. 3, 2005, pp.657-660
Published online, 1st February, 2005
DOI: 10.3987/COM-04-10302
Molybdatophosphoric Acid/NaNO2/Wet SiO2 as an Efficient System for Oxidation of 1,4-Dihydropyridines under Mild and Heterogeneous Conditions

Khodabakhsh Niknam,* Mohammah Ali Zolfigol,* Seyed Mehdi Razavian, and Iraj Mohammadpoor-Baltork

*Chemistry Department, Faculty of Sciences, Persian Gulf University, Bushehr 75168, Iran


A combination of molybdatophosphoric acid (H3PMo12O40.xH2O) and sodium nitrite in the presence of wet SiO2 was used as an effective oxidizing agent for the oxidation of 1,4-dihydropyridines to the corresponding pyridine derivatives under mild and heterogeneous conditions in excellent yields.