On treatment with perfluoro-cis-2,3-dialkyloxaziridines, mono-, bi-, and tricyclic nitrogen heteroaromatics afford the corresponding N-oxides under mild reaction conditions and in medium to high yields. The course of the reaction is not altered by the presence of various residues on the ring or in side chains and the N-oxides of polyfunctional, naturally occurring compounds have been prepared.
Petrov, Viacheslav A.; DesMarteau, Darryl D., Journal of the Chemical Society. Perkin transactions I, 1993, # 4, p. 505 - 510