New approach to the synthesis of pyrrolo[3,4-c]pyridines

Abstract

Strategies of synthesis of pyrrolo[3,4-c]pyridines were developed based on cyclization of 3-phenacyl-4-ethoxycarbonyl(acetyl)pyrrole derivatives reacting with N-methylformamide or formamide, and also on recyclization of pyrrolo[3,4-c]pyrylium salts under the action of ammonium acetate and hydrazine acetate. The influence of substituents in initial reagents on composition of reaction products was studied.