A simple and general approach for the synthesis of highly functionalized 6-oxo-1,6-dihydropyridines
作者:Sukeerthi Kumar、Rajni R. Thakur、Sanjay R. Margal、Abraham Thomas
DOI:10.1016/j.tet.2013.04.082
日期:2013.6
A variety of 5-cyano-4-methylthio-6-oxo-1,6-dihydropyridine-3-carboxylates have been efficiently synthesized in a one-pot reaction from N-alkyl and N-aryl derivatives of 2-cyano-3,3-bis(methylthio)acrylamides and selected β-keto esters. The reaction proceeds via potassium hydrogen carbonate mediated conjugate addition of a β-keto ester to 2-cyano-3,3-bis(methylthio)acrylamide followed by loss of methyl