Organic compounds -- part of the class 532-570 series – Organic compounds – Halogen containing
Patent
1998-10-30
2000-12-05
Siegel, Alan
Organic compounds -- part of the class 532-570 series
Organic compounds
Halogen containing
570132, 570135, 570153, C07C 1908
Patent
active
061569437
ABSTRACT:
Processes are disclosed for producing hydrohaloolefins having the formula CF.sub.2 .dbd.C(CH.sub.2 RF)CF.sub.3, the formula FRCF.dbd.C(CH.sub.2 RF)CF.sub.3 or the formula FRCF.dbd.C(CH.sub.2 RF)(CF.sub.2 RF) wherein each R is a difinctional group of the formula --C.sub.2 F.sub.2 XY-- where X and Y are attached to the same carbon, each X is H, Br, Cl or F and each Y is F or CF.sub.3. The processes involve reacting (CF.sub.3).sub.2 C.dbd.CH.sub.2 or certain olefinic adducts thereof with a second olefm of the formula CF.sub.2 .dbd.CXY in the liquid phase in the presence of a Lewis acid catalyst selected from the group consisting of antimony pentafluoride and aluminum chlorofluoride.
Also disclosed is 1,1,2,2,-tetrafluoro-3,3-bistrifluoromethylcyclobutane and a process for its production which involves reacting (CF.sub.3).sub.2 C.dbd.CH.sub.2 with CF.sub.2 .dbd.CF.sub.2 in the liquid phase in the presence of a Lewis acid catalyst selected from the group consisting of antimony pentafluoride and aluminum chlorofluoride.
Also disclosed are olefins of the formula FRCF.dbd.C(CH.sub.2 RF)CF.sub.3, FRCF.dbd.C(CH.sub.2 RF)(CF.sub.2 RF) or CF.sub.2 .dbd.C(CH.sub.2 R.sup.1 F.)CF.sub.3 (R, X and Y are defined as above) wherein R.sup.1 is --C.sub.2 F.sub.2 X(CF.sub.3)-- where X and (CF.sub.3) are attached to the same carbon or --C.sub.2 F.sub.3 X.sup.1 -- wherein X.sup.1 is H, Br or Cl.
REFERENCES:
patent: 2427116 (1947-09-01), Barrick
patent: 2462347 (1949-02-01), Barrick
patent: 2848504 (1958-08-01), Dixon
patent: 2957032 (1960-10-01), Hauptschein
patent: 3316312 (1967-04-01), McCane
patent: 3852474 (1974-12-01), Simons
patent: 3954893 (1976-05-01), O'Neill
patent: 3996299 (1976-12-01), Fozzard
patent: 5162594 (1992-11-01), Krespan
Krespan et al., Chem. Rev., 96, 3269-3301, 1996.
Snegirev et al., Catalytic and Hydride Reduction of Hexafluoropropylene Dimers, Plenum Publishing Corporation, 2489-2494, 1984.
E. I. Du Pont de Nemours and Company
Siegel Alan
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