The N-amination and subsequent oxidation by bromine of imidazo[1,5-a]pyridines
Abstract
Imidazo[1,5-a]pyridines are N-aminated by O-mesityl- or O-p-tolyl-sulphonylhydroxylamine and the resulting N-amino-compounds are converted by saturated aqueous bromine into brominated 1,2-dihydroazeto[1,2-a]pyridinium salts.