7H-Naphtho

Aminobenzenethiols and their salts react with anthraquinones yielding nap-hthophenothiazines. A number of substituted e Jo-12,17-o-phenylene-12,17-dihy-dro-naphtho[2,3-u]-l,4-benzothiazino[3,2 -c]phenothiazines and substituted endo-i, 13-o-phenylene-8,13-dihydro-6-chloro-7H-naphtho[2,3-a]phenothiazin-7-ones have been synthesized (83PS(17)85, 82IJC(B)695) by the condensation of endo-9, 0-o-phenylene-2,3-dichloro-9,l0-dihydro-1,4-anthraquinone with substituted 2-amino-thiophenol and their zinc mercaptides, respectively. 

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