Reaction of benzo[α]Phenoxazin-9-one with ethylenimine

The reaction of benzo[a]phenoxazin-9-one and its 5-sulfides with ethylenimine has given 11-ethyleneamino derivatives. It has been shown that in contrast to the arylamines, which enter position 5 of benzo[a]-phenoxazin-9-one, ethylenimine reacts at the quinoid nucleus of the phenoxazine system. Absorption spectra in the visible region for phenoxazinones substituted in the quinoid nucleus have been recorded.