Direct amination of aromatic compounds by nitrenium and alkylnitrenium ions. Photolysis of 1-(amino and alkylamino)-2-methyl-4,6-diphenylpyridinium tetrafluoroborates in aromatic solvent– trifluoroacetic acid

Abstract

Photolyses of 1-(amino, methylamino, and dimethylamino)-2-methyl-4,6-diphenylpyridinium tetrafluoroborates in benzene or toluene in the presence of trifluoroacetic acid gave anilines or toluidines by an electrophilic aromatic substitution of the parent nitrenium ion and alkylnitrenium ions in singlet states.