Method of making trifluoromethoxybenzenes
US6118028A · kind A · utility
1Cited by
1References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 1998 |
| Grant date | Sep 12, 2000 |
| Priority date | — |
| Expiry date | Mar 16, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a process for making an .alpha.,.alpha.,.alpha.-trifluoromethoxybenzene by reacting an .alpha.,.alpha.,.alpha.-trichloromethoxybenzene or an .alpha.,.alpha.,.alpha.-tribromomethoxybenzene with gaseous hydrogen fluoride in the presence of a catalyst of antimony pentachloride, molybdenum pentachloride, molybdenum dichloride dioxide, molybdenum oxide, or a mixture thereof. The hydrogen fluoride is used in an amount of about 1 to about 1.4 times stoichiometric and is at about atmospheric pressure. The reaction is performed at about 30 to about 100.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.