Studies on the syntheses of heterocyclic compounds. Part DLXXXIX. A simple route to pyridocarbazoles
Abstract
Synthesis of 4-acetoxy-3-methyl-6H-pyrido[4,3-b]carbazole (11) and the isomeric pyrido[3,4-b]carbazole (14) are described. The key step involves condensation of indolylmagnesium bromide with 3-acetoxy-5-acetoxy-methyl-4-hydroxymethyl-2-methylpyridine (2).