Reactions of 6-substituted-2, 3-dichloronaphthoquinones with Aniline

The 2,6‐disubstituted‐, 3,6‐disubstituted‐5H‐benzo[a]phenothiazin‐5‐one derivatives and 7‐substituted‐benzo[a] [1,4]benzothiazino[3,2‐a]phenothiazine derivatives were prepared by the condensation of 2,3,6‐trisubstituted‐1,4‐naphthoquinones with 2‐aminothiophenol. The resulting compounds were subjected to reduction, dehalogenation and condensation with aniline. Some of the condensation intermediates were isolated and the reaction mechanism was also investigated.

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Angular heterocycles. A convenient synthesis of azabenzophenothiazines

Kang

Nan'ya

Maekawa

et al. 1988

Journal of Heterocyclic Chem

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The acid‐catalysed reaction of substituted 1,4‐naphthoquinones with o‐aminoheterocyclic thiones in alcoholic solution afforded substituted monoazabenzo[a]phenothiazin‐5‐ones 4,5 and substituted benzo[a][1,4]diazabenzothiazino[3,2‐c]phenothiazin‐5‐one (6). Some of the resulting compounds were subjected to dehalogenation. The structures of the products were assigned by elemental analysis, 1H‐nmr, and other spectral analysis.

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Reactions of 6-substituted-2, 3-dichloronaphthoquinones with Aniline

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ChemInform Abstract: RK. 6‐SUBSTITUIERTER 2,3‐DICHLOR‐NAPHTHOCHINONE MIT ANILIN 2. MITT. SYNTH. VON NAPHTHOCHINON‐DERIVATEN

ChemInform Abstract: RK. 6‐SUBSTITUIERTER 2,3‐DICHLOR‐NAPHTHOCHINONE MIT ANILIN 2. MITT. SYNTH. VON NAPHTHOCHINON‐DERIVATEN

The condensation products of 2,3,6‐trisubstituted‐1,4‐naphthoquinones with 2‐aminothiophenol

Angular heterocycles. A convenient synthesis of azabenzophenothiazines

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