Organic compounds -- part of the class 532-570 series – Organic compounds – Silicon containing
Reexamination Certificate
2008-03-25
2008-03-25
Barts, Samuel A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Silicon containing
Reexamination Certificate
active
07348446
ABSTRACT:
A process for the production of trialkylsilyl (fluorosulfonyl)difluoroacetate by contacting (fluorosulfonyl)difluoroacetyl fluoride with siloxane. The amount of (fluorosulfonyl)difluoroacetic acid by-product in trialkylsilyl(fluorosulfonyl)difluoroacetate is reduced by contacting said mixture with trialkylsilyl halide.
REFERENCES:
patent: 5268511 (1993-12-01), Farnham
patent: WO 93/20085 (1993-10-01), None
William R. Dolbier Jr., et al. “Trimethylsilyl fluorosulfonyldifluoroacetate (TFDA): a new, highly efficient difluorocarbene reagent”, Journal of Fluorine Chemistry, 125 (2004) pp. 459-469.
Robin J. Terjeson et al., “Silver (Fluorosulfonyl)Difluoroacetate—A New Route to Fluorosulfonyl Esters”, Journal of Fluorine Chemistry, 42 (1989) pp. 187-200.
Feng Tian et al., “A Novel and Highly Efficient Synthesis of gem-Difluorocyclopropanes”, Organic Letters, vol. 2, No. 4, (2000) pp. 563-564.
W. R. Dolbier, Jr., et al., “Preparation and Use of a New Difluorocarbene Reagent, Trimethylsilyl 2-Fluorosulfonyl-2,2-Difluoroacetate: n-Butyl 2,2-Difluorocyclopropanecarboxylate”, Organic Syntheses, p. 172, vol. 80, (2003).
J. D. Citron, “Reactions of Group IVB Compounds with Acyl Fluorides”, Journal of Organometallic Chemistry, pp. 21-26, vol. 30, (1971).
Sievert Allen Capron
Sprague Lee G.
Barts Samuel A.
E.I. Du Pont de Nemours and Company
LandOfFree
Process for the production of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2794938