Preparation of isoflurane by reaction of 2,2,2-trifluoroethyl difluoro-methyl ether and chlorine in added water, at low temperatures and/or at higher conversions
US6551468B1 · kind B1 · utility
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13Claims
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Key dates
| Filing date | Aug 21, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/22
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for preparing isoflurane (1-chloro-2,2,2-trifluoroethyl difluoromethyl ether) by reacting PFE (2,2,2-trifluoroethyl difluoromethyl ether) with chlorine in the presence of ultraviolet light and added water, at a low temperature and/or at a high conversion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.