Collect. Czech. Chem. Commun.
1989, 54, 200-205
https://doi.org/10.1135/cccc19890200
Ferricyanide oxidation of 1-substituted pentaphenylpyridinium salts. A novel route to 1-substituted 2,3,4,5-tetraphenylpyrroles
Stanislav Böhm, Hanuš Slavík and Josef Kuthan
Department of Organic Chemistry, Prague Institute of Chemical Technology, 166 28 Prague 6
Abstract
Oxidation of 1-substituted 2,3,4,5,6-pentaphenylpyridinium salts Ia-Ij by potassium ferricyanide in an alkaline medium yields the corresponding 1-substituted 2,3,4,5-tetraphenylpyrroles in 68 to 76% yields. The selectivity of the reaction is discussed.
