One-pot synthesis of substituted 1,3-benzothiazole and 1,4-benzothiazinone from dibromonitroacrylates |
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Authors: | S V Makarenko K S Kovalenko Ya S Vershinina V M Berestovitskaya |
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Institution: | 1. Herzen State Pedagogical University of Russia, nab. r. Moiki 48, St. Petersburg, 191186, Russia 2. Chemical & Food Aromatic Plant Ltd., Partizanskaya ul. 11, St. Petersburg, 195027, Russia
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Abstract: | Alkyl 2,3-dibromo-3-nitroacrylates reacted with 2-aminobenzenethiol at 18–20°C in benzene to give alkyl 1,3-benzothiazole-2-carboxylates, whereas in glacial acetic acid 2-nitromethylidene-2H-1,4-benzothiazin-3(4H)-one was obtained. |
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