1962 年 82 巻 7 号 p. 987-991
Reaction between 1, 2-dihydro-3H-pyrido [3, 2, 1-kl] phenothiazin-3-one and aromatic aldehydes was examined and 2-benzylidene-1, 2-dihydro-3H-pyrido [3, 2, 1-kl] phenothiazin-3-one derivatives and their isomers, 2-benzyl-3H-pyrido [3, 2, 1-kl] phenothiazin-3-one derivatives, were obtained. Relationship between the structure of these products and their ultraviolet and infrared spectra were clarified. Reduction of 2-benzyl-3H-pyrido [3, 2, 1-kl] phenothiazin-3-one with lithium aluminium hydride afforded 2-benzyl-1, 2-dihydro-3H-pyrido [3, 2, 1-kl] phenothiazin-3-one and -3-ol.