Preparation of 2,4,5-trifluorobenzoic acid by decarboxylation of 3,4,6-trifluorophthalic anhydride
US4935541A · kind A · utility
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2References
11Claims
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Key dates
| Filing date | Nov 20, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Nov 20, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
It has been discovered that 3,4,6-trifluorophthalic anhydride may be decarboxylated by heating in a polar aprotic solvent to yield 2,4,5-trifluorobenzoic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.