The nitration and halogenation reactions of 2-(pentafluorosulfanyl)- and 2-(trifluoromethyl)-1,3-benzothiazoles were studied. Methods for the preparation of previously undescribed mononitro-substituted 1,3-benzothiazoles (4-nitro-2-(pentafluorosulfanyl)-1,3-benzothiazole, 4-nitro-2-(trifluoromethyl)-1,3-benzothiazole, and 6-nitro-2-(pentafluorosulfanyl)-1,3-benzothiazole) as well as a new method for the synthesis of the previously known 6-nitro-2-(trifluoromethyl)-1,3-benzothiazole were developed. The procedure involved the reaction of 2-(trifluoromethyl)-1,3-benzothiazole with NH4NO3 in TFAA at room temperature. An efficient method for the preparation of 2-substituted 4,5,6,7-tetrabromo-1,3-benzothiazoles based on the reaction of 2-substituted 1,3-benzothiazoles with NBS in TFA–H2SO4 at room temperature was proposed.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, 2023, 59(4/5), 304–308
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Guzyr, O.I., Potikha, L.M., Shishkina, S.V. et al. The nitration and bromination of 2-(pentafluorosulfanyl)-1,3-benzothiazole and 2-(trifluoromethyl)-1,3-benzothiazole. Chem Heterocycl Comp 59, 304–308 (2023). https://doi.org/10.1007/s10593-023-03197-9
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DOI: https://doi.org/10.1007/s10593-023-03197-9