A variety of Hantzsch 1,4-dihydropyridines were oxidized to the corresponding pyridines in high yields in the presence of H(6)PMo(9)V(3)O(40), a Keggin type heteropolyacid, in refluxing acetic acid. The heteropolyacid was found to be reusable.
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| http://dx.doi.org/10.1016/j.bmcl.2007.04.002 | DOI Listing |
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