Abstract
Perfluorinated 1-methyl- and 1-ethylbenzocyclobutenes and 2-methyl- and 2-ethylbenzocyclobutenones reacted with 20% oleum at 150°C to give mixtures of almost equimolar amounts of 3-perfluoroalkyl-4,5,6,7-tetrafluorophthalides and perfluoro-3-hydroxy-3-alkylphthalides. In addition to these products, the reaction of perfluoro-2-methylbenzocyclobutenone with oleum at 100°C afforded perfluoro-2-hydroxy-2-methylbenzocyclobutenone. The reaction of perfluoro-2-phenylbenzocyclobutenone with oleum produced perfluoro-2-benzoylbenzoic acid, whereas polyfluorobenzocyclobutene-1,2-diols were converted to the corresponding cyclic sulfates.
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ACKNOWLEDGMENTS
The authors thank joint Chemical Research Center, Siberian Branch, Russian Academy of Sciences, for providing facilities for spectral and analytical studies.
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Translated from Zhurnal Organicheskoi Khimii, 2023, Vol. 59, No. 1, pp. 51–61 https://doi.org/10.31857/S0514749223010032.
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Golokhvastova, D.S., Zonov, Y.V., Karpov, V.M. et al. Reaction of Polyfluorinated Benzocyclobutenes with Oleum. Russ J Org Chem 59, 29–37 (2023). https://doi.org/10.1134/S1070428023010025
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DOI: https://doi.org/10.1134/S1070428023010025