Trifluoromethylbenzoyl bromide and conversion of same to bromobenzotrifluoride
US4968852A · kind A · utility
2Cited by
3References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Nov 6, 1990 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/60
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A novel compound, trifluoromethylbenzoyl bromide, is formed by bromination of trifluoromethylbenzoic acid with, e.g., phosphorus tribromide or by halogen exchange reaction of trifluoromethylbenzoyl chloride with bromine in the presence of a metal bromide. Decarbonylation of 2-, 3- or 4-trifluoromethylbenozyl bromide using a catalyst such as a phosphine-rhodium complex gives 2-, 3- or 4-bromobenzotrifluoride without forming isomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.