Preparation of perfluoroalkanecarboxylic acids and novel perfluoroalkanedichloroethylenes obtained
US4906416A · kind A · utility
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Key dates
| Filing date | Feb 8, 1985 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Feb 8, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing perfluoroalkanecarboxylic acids, wherein a perfluoroiodoalkane, R.sub.F I, is reacted with trichloroethylene in an acidic solvent in the presence of zinc, and the 2-perfluoroalkyl-1,1-dichloroethylene thus obtained is oxidized with the aid of permanganate, R.sub.F representing a straight chain or branched perfluoro radical containing one to 20 carbon atoms, together with certain novel perfluoroalkyldichloroethylenes having four or more carbon atoms so obtained.
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