Photochemical reactions of 6-alkylamino- and 6-alkylanilino-5H-benzo[a]phenothiazin-5-ones

Photochemical reactions of 6-alkylamino- and 6-alkylanilino-5H-benzoa]phenothiazin-5-ones have been investigated. 6-Ethylamino- and 6-isopropylamino-5H-benzoa]phenothiazin-5-ones and 6-methylanilino- and 6-ethylanilino-5H-benzoa]phenothiazin-5-ones gave 6-amino-5H-benzoa]phenothiazin-5-one and 6-anilino-5H-benzoa]phenothiazin-5-one, respectively, on irradiation.