FLUORINATED ALKANESULFONIC ACID ANHYDRIDES AND PROCESSES FOR MAKING THE SAME

WIPO Patent Application WO/2009/073426

A3

The invention provides a process for the preparation of fluorinated alkanesulfonic acid anhydrides by contacting alkanesulfonic acids with phosphorus pentoxide, the phosphorus pentoxide being provided as a dispersion in an inert oil. The invention also provides novel fluorinated alkanesulfonic acid anhydrides including 2-hydrotetrafluoroethanesulfonic acid anhydride.

JUNK CHRISTOPHER P (US)
ROSTOVTSEV VSEVOLOD (US)
SIEVERT ALLEN CAPRON (US)
SPRAGUE LEE G (US)

PCT/US2008/084464

August 08, 2013

November 24, 2008

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DU PONT (US)
JUNK CHRISTOPHER P (US)
ROSTOVTSEV VSEVOLOD (US)
SIEVERT ALLEN CAPRON (US)
SPRAGUE LEE G (US)

C07C303/00; C07C309/00

US5808149A

1998-09-15

RAGULIN L I ET AL: "beta.-Sultones containing fluorine. XXVII. .alpha.-Hydrotetrafluoroet hanesulfonic acid derivatives", IZVESTIA AKADEMII NAUK SSSR. SERIA HIMICESKAA, MOSCOW, RU, no. 7, 1 January 1968 (1968-01-01), pages 1560 - 1564, XP009114921, ISSN: 0002-3353
STANG ET AL: "Perfluoroalkenesulfonic Esters: Methods of Preparation and Applications in Organic Chemistry", SYNTHESIS,, 1 January 1982 (1982-01-01), pages 85 - 126, XP002521747
ROSTOVTSEV ET AL: "Preparation and Synthetic Applications of Aryl Tetraflates (ArOSO2CF2CF2H)", JOURNAL OF ORGANIC CHEMISTRY,, vol. 73, no. 2, 1 January 2008 (2008-01-01), pages 711 - 714, XP002521745

HENDRICKSON, John, S. (Legal Patent Records Center4417 Lancaster Pik, Wilmington Delaware, US)

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