Paper 112 of this series describes the preparation of 2-azaphenothiazine and &chloro-2- azaphenothiazine. Paper I11 describes the preparation of 2-hydroxyphenothiazine1 2- benzoyloxyphenothiazine, 2-methylthiophenothiazine, 2-and 4-tri- fluoromethylthiophenothiazine, 2-methylsulfonylphenothiazine, and 2- trifluoromethylsulfonylphenothiazine. In Tables I and I1 of the present paper are reported ...