HYDRAZINES AND AZO COMPOUNDS FROM O-DIPHENYLPHOSPHINOYL ARYLHYDROXYLAMINES
The reactions of the O-diphenylphosphinoylhydroxylamines 1a-d with the amines 2-4 lead to the hydrazines 5 and the symmetrical azo compounds 6. 5 are formed via electrophilic amination; the azo compounds 6 do not result from the corresponding phenylnitrene intermediates.