Abstract
Simple preparative methods of sulfonation of thiophene derivatives by complexes of sulfur trioxide with ethers, amides, trialkyl phosphates, and sulfoxides under mild conditions were developed.
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The developed methods of synthesis were protected by inventor certificates Nos. 707916 and 914557.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1183–1186, September, 1987.
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Shustareva, T.K. New methods of sulfonation in the thiophene series. Chem Heterocycl Compd 23, 943–946 (1987). https://doi.org/10.1007/BF00475355
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DOI: https://doi.org/10.1007/BF00475355