Process for the preparation of 2,2-difluoropent-4-enoic acids and acid derivatives
US4892962A · kind A · utility
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6Claims
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Key dates
| Filing date | Dec 7, 1987 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Dec 7, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07F7/1896
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The reaction of allyl bromo- or chloro-difluoroacetates with monochlorisilanes in the presence of zinc with heating gives silyl esters of .alpha.,.alpha.-difluoro-.gamma.,.delta.-pentenoic acids. The free acids, from which acid derivatives can be prepared by conventional methods, are obtained by hydrolysis. The pentenoic acids and pentenoic acid derivatives are suitable for the preparation of polymers and copolymers, from which metal-organic polymers and copolymers having catalytic properties are obtainable.
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