Role of Steric Factors in Intramolecular H-Bond Formation and Peculiarities of Electrochemical Oxidation of Ethyl 6-Alkylsulfanyl-5-Cyano-2-Methyl-4-Phenyl-1,4-Dihydropyridine-3-Carboxylates

6-Alkylsulfanyl-5-cyano-2-methyl-4-phenyl-1,4-dihydropyridine-3-carboxylates containing electron-donating or electron-withdrawing groups were prepared by alkylation of 6-thioxo-1,4,5,6-tetrahydropyridine-3-carboxylate with alkyl halides. The H-bond formation in the case of 6-alkylsulfanyl substituent bearing sterically small hydrogen bond acceptor explains a partial lack of correlation of the electrochemical oxidation potentials with Taft's σ*-constants. How to Cite Baumane, L.; Krauze, A.; Krasnova, L.; Belyakov, S.; Duburs, G.; Stradiņs, J. Chem. Heterocycl. Compd. 2014 , 49 , 1623. [ Khim. Geterotsikl. Soedin. 2013 , 1752.] For this article in the English edition see DOI 10.1007/s10593-014-1413-7