Preparation of 3,4,6-trifluorophthalic acid
US5596104A · kind A · utility
2Cited by
3References
21Claims
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Key dates
| Filing date | Jun 18, 1993 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Jun 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
3,4,6-trifluorophthalic acid is prepared in high yield by reaction of a 3,4,6-trichloro-N-substituted phthalimide with potassium fluoride at temperatures in the range of 200.degree. to 270.degree. C. in the absence of a catalyst to form the corresponding trifluoro-N-substituted phthalimide which, in turn, is hydrolyzed to form the 3,4,6-trifluorophthalic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.