Preparation of aromatic fluoro-compounds
US4263458A · kind A · utility
3Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Mar 19, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/28
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
4,4'-difluoro-benzophenone is prepared from 4,4'-diamino-diphenylmethane by diazotization in anhydrous or concentrated aqueous hydrogen fluoride and decomposition of the diazonium fluoride thus produced in the presence of nitrous acid or nitrite as oxidizing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.