Abstract
In the reaction of anthra[1, 2-c]-1, 2,-5-thiadiazole-6,11-dione (I) with mercaptans, atylsulfinic acids, and bisulfite, the nucleophilic agent is directed into position 4 of the nucleus with the formation of substituted hydroquinones, the oxidation of which leads, respectively, to 4-aryl(alkyl)thio, 4-arylsulfonyl, and 4-sulfo derivatives of anthra [1,2-c]-1,2,5-thiadiazole-6,11-dione (II, VI, IX). When entry into position 4 is impossible, addition to the carbonyl oxygen atom takes place. On being heated with bisulfite, the quinonesulfonic acid IX is converted into the monsulfuric acid ester of the hydroquinonesulfonic acid X, and on reaction with benzenesulfinic acid 4-phenylsulfonylanthraquinonethiadiazole (VIa) is converted into the benzenesulfonic acid monoester XI.
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For part V, see [1].
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Gorelik, M.V., Lantsman, S.B. Studies on quinones. Chem Heterocycl Compd 4, 337–341 (1968). https://doi.org/10.1007/BF00755275
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DOI: https://doi.org/10.1007/BF00755275