Ammonium salts of fluorophthalamic acids and method of preparation
US4374266A · kind A · utility
4Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1980 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Dec 29, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C233/65
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Ammonium salts of fluorophthalamic acids characterized by the formula ##STR1## wherein n is 1 or 2, are prepared by the steps of (A) reacting a chlorophthalic anhydride of the formula ##STR2## where n is as defined previously, with potassium fluoride or cesium fluoride to form a fluorophthalic anhydride of the formula ##STR3## where n is as previously defined, and (B) reacting the fluorophthalic anhydride with ammonium to form an ammonium salt of a fluorophthalamic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.