Ethyl 2-(arylhydrazino)-4-bromo-3-oxobutanoates as synthons for preparation of picolinium salts, indolizines and imidazo-[1,2-a]pyridines

摘要

The synthesis of 2-methylpiridine bromides of ethyl ester of 2-(arylhydrazono)- 4-bromo-3-oxobutanoic acid, indolizine and imidazo-[1,2-a]-piridine derivatives has been described.