Rhodia Limited

Roderic Nigel Simpson

Owen Ross Chambers

Fluorinated ethers of the formula: ##STR1## wherein R is hydrogen, fluorine, alkyl of 1 to 6 carbon atoms, or fluoroalkyl of 1 to 6 carbon atoms, R' is hydrogen, alkyl of 1 to 6 carbon atoms, or fluoroalkyl of 1 to 6 carbon atoms, and R' is fluorine, alkyl of 1 to 6 carbon atoms or fluoroalkyl of 1 to 6 carbon atoms, e.g. Desflurane, are prepared by fluorinating a corresponding ether of formula: ##STR2## with a solid transition metal fluoride fluorinating agent such as cobaltic fluoride.

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Tidenham Chase, United Kingdom

Roderic Nigel Simpson