Process for preparing 3,4,6-trifluorophithalonitrile
US5153350A · kind A · utility
2Cited by
9References
9Claims
0Family size
Inventor
Key dates
| Filing date | May 16, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | May 16, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/51
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing 3,4,6-trifluorophthalonitrile from 3,4,5,6-tetrachlorophthalonitrile comprising the sequential steps of reductively dechlorinating the tetrachlorophthalonitrile, in the presence of a metal in an aqueous acidic medium, to produce 3,4,6-trichlorophthalonitrile and then subjecting the trichlorophthalonitrile to a chlorine-fluorine exchange by reaction with a fluoride source in a polar aprotic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.