Reactions of 1,3-dihydrobenzo[<Emphasis Type="Italic">c</Emphasis>]thiophene 2,2-dioxides with electrophilic agents |
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Authors: | G A Tashbaev |
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Institution: | (1) Gulistan State University, 4th mikroraion, 707000 Gulistan, Uzbekistan Republic |
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Abstract: | Nitration, sulfonation, and iodination of 1,3-dihydrobenzoc]thiophene 2,2-dioxide and its derivatives with electron-releasing and electron-withdrawing substituents were studied. Electrophilic substitution in 1,3-dihydrobenzoc]thiophene 2,2-dioxide occurs at position 5. The presence of electron-withdrawing substituents in this position hinders further substitution, while electron-releasing substituents in positions 5 and 6 direct an electrophile to position 4.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 428–431, February, 2005. |
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Keywords: | 1 3-dihydrobenzo[c]thiophene 1 3-dihydrobenzo[c]thiophene 2 2-dioxides nitration sulfonation halogenation |
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