Process for the preparation of extensively fluorinated aliphatic

Details Process for the preparation of extensively fluorinated aliphatic Process for the preparation of extensively fluorinated aliphatic

1991-02-14

1991-09-24

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

568684, C07C 1720, C07C 4100

Patent

active

050515357

ABSTRACT:
A process is described for the preparation of the title compounds from the corresponding iodine-containing compounds by reaction with bromide or chloride ions present as salts, in a dipolar aprotic solvent, in the presence of a metal complex compound which contains chromium, nickel, cobalt or rhodium as the central atom and contains, per central atom, 1, 2 or 3 bromine or chlorine atoms and at least one additional phosphorus-containing ligand, at 20.degree. to 140.degree. C. Good yields are obtained in this way without the difficulties associated with the known procedure using elemental halogens at elevated temperatures. The compounds prepared can be used in the medical sector and as liquids resistant to high temperatures.

REFERENCES:
patent: 2678953 (1954-05-01), Conly
patent: 2875253 (1959-02-01), Barnhart
patent: 3972953 (1976-08-01), Lyons
patent: 4222967 (1980-09-01), Boehm
Long, D. M. et al., "Is There a Time and Place for Radiopaque Fluorocarbons?", In Banks, Preparation, Properties, and Industrial Applications of Organofluorine Compounds, N.Y., Wiley, 1982, pp. 153-154.
Haszeldine, R. N., J. Chem. Soc.: 3761-3768, (1953).
Huang, B. et al., Chem. Abs., 102:78312x, (1985).
Furutaka, Y. et al., Chem. Abs., 104:88106p, (1986).

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