Process for producing brominated trifluoromethylbenzenes
US6506951B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a process for producing a brominated trifluoromethylbenzene represented by the general formula (1). This process includes brominating in a liquid or gas phase a trifluoromethylbenzene, represented by the general formula (2), by bromine in the presence of a catalyst under a condition that the bromine is coexistent with chlorine, where n is an integer of 1-2, and m is an integer of 1-3 where n is an integer of 1-2. The catalyst is preferably iron chloride in the case of the bromination in a liquid phase. It is preferably activated carbon carrying thereon iron chloride in the case of the bromination in a gas phase. The trifluoromethylbenzene is turned to the brominated trifluoromethylbenzene with high reactivity and high yield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.