SYNTHESIS OF ARYLPERFLUOROALKYL ETHERS BY DIRECT FLUORINATION

Arylperfluoroalkyl ethers ArOCF2CF2X (X = F, OC3F7) were prepared from vinyl ethers ArOCF = CFX by reaction with elemental fluorine at low t emperatures. The best solvent for fluorination was a mixture of chloro form and fluorotrichloromethane. Yields were improved by adding ethano l to the solvent mixture. The starting olefins were prepared by decarb oxylation of the acid salts ArOCF2CF2CO2Na (X = F) or by reaction of a reneoxides with perfluoropropyvinyl ether (X = OC3F7). (C) 1998 Elsevi er Science S.A. All rights reserved.