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Fluorosulfonyl-containing heterocyclic compounds

V. Pyrolytic transformations of hexafluoroisobutenylidene sulfate

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

When hexafluoroisobutenylidene sulfate is heated above 80°C, hexafluorodimethylketene is liberated and the inner anhydride of hexafluoro-α-pyrosulfoisobutyric acid (I) is formed. On storage, anhydride I is spontaneously isomerized to hexafluoroisobutenylidene pyrosulfate, which is converted to the mixed anhydride of pentafluoromethacrylic and fluoropyrosulfonic acids on heating above 130° for many hours. On heating above 160°, I is decarboxylated to give hexafluoropropane-2,2-disulfonic acid anhydride, which is inclined to isomerize to pentafluoropropene-2-pyrosulfonyl fluoride.

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Literature cited

  1. G. A. Sokol'skii, V. M. Pavlov, S. A. Agafonov, and I. L. Knunyants, Khim. Geterotsikl. Soed., 178 (1973).

  2. V. M. Pavlov, I. V. Galakhov, L. I. Ragulin, A. A. Alekseev, G. A. Sokol'skii, and I. L. Knunyants, Khim. Geterotsikl. Soed., 1645 (1971).

  3. V. M. Pavlov, A. A. Alekseev, G. A. Sokol'skii, and I. L. Knunyants, Khim. Geterotsikl. Soed., 306 (1972).

  4. I. L. Knunyants, L. S. German, and B. L. Dyatkin, Izv. Akad. Nauk SSSR, Otd. Khim. Nauk, 1353 (1956).

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Authors
  1. V. M. Pavlov
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  2. V. N. Derkachev
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  3. G. A. Sokol'skii
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  4. I. L. Knunyants
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Additional information

See [1] for Communication IV.

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No, 10, pp. 1321–1324, October, 1973.

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Pavlov, V.M., Derkachev, V.N., Sokol'skii, G.A. et al. Fluorosulfonyl-containing heterocyclic compounds. Chem Heterocycl Compd 9, 1195–1198 (1973). https://doi.org/10.1007/BF00477446

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  • DOI: https://doi.org/10.1007/BF00477446

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