Process for preparing aliphatic fluorofomates
US6858751B1 · kind B1 · utility
2Cited by
2References
28Claims
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Key dates
| Filing date | Mar 17, 2000 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Mar 17, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C68/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method for the production of aliphatic fluoroformates, wherein carbonyl fluoride is made to react with aliphatic alcohol in the presence of sodium fluoride in ether at a temperature of −20° to 50° C. The method is carried out using carbonyl fluoride obtained by reacting phosgene with surplus powdered sodium fluoride, whereby the grains thereof have a specific surface of 0.1 m2/g or more and/or an average diameter of 20 μm or less, at a temperature ranging from 25° to 120° C. The method enables unstable fluoroformates such as tertiobutyl to be obtained with excellent yields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.