Collect. Czech. Chem. Commun. 1989, 54, 1870-1879

Alkylation of 2,4,4,6-tetraphenyl-1,4-dihydropyridine

Marián Schwarz and Josef Kuthan

Department of Organic Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6


A series of photochromic N-methyl derivatives IIIa-IIIh was synthesized by alkylation of 1-sodio-2,4,4,6-tetraphenyl-1,4-dihydropyridine (II) in an inert atmosphere. On the other hand, the starting material II afforded products IVa and IVb in the presence of atmospheric oxygen. Mechanisms of acidobasic transformations of compounds IVa and IVb are discussed and spectral characteristics of new compounds are interpreted.