Sodium dithionite reduction of α-substituted N-alkylpyridinium salts (derived from picolinic acid derivatives) afforded the corresponding 1, 4-dihydropyridines with a new substitution pattern, in which the electron-withdrawing group is at the α-position. These compounds promote biomimetic reductions and are hence considered functional NADH analogues.
[Hegedus, Louis S.; Schwindt, Mark A.; De Lombaert, Stephane; Imwinkelried, Rene Journal of the American Chemical Society, 1990 , vol. 112, # 6 p. 2264 - 2273]
[Hegedus, Louis S.; Schwindt, Mark A.; De Lombaert, Stephane; Imwinkelried, Rene Journal of the American Chemical Society, 1990 , vol. 112, # 6 p. 2264 - 2273]