Fluorosulfates of hexafluoroisobutylene and its higher homologs and their derivatives
AssigneeE. I. Du Pont de Nemours and Company
InventorsVictor Cherstkov, Nina Delyagina, Viacheslav Petrov, Paul Resnick
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Abstract
Hexafluoroisobutylene and its higher homologs are easily reacted with SO3 to give fluorosulfates of the formula CH2═C(R)CF2OSO2F, wherein R is a linear branched or cyclic fluoroalkyl group comprised of 1 to 10 carbon atoms and may contain ether oxygen. These compounds react under mild conditions with many nucleophiles to give CH2═C(R)CF2X, where X is derived from the nucleophile. This reaction provides a route to many substituted hexafluoroisobutylenes, which copolymerize easily with other fluoro- and hydrocarbon monomers such as vinylidene fluoride and ethylene.
Claims6
A process comprising contacting CH2═C(R)CF3 with SO3 in the presence of a Lewis acid, wherein R is a linear, branched, or cyclic fluoroalkyl group comprised of 1 to 10 carbon atoms and may contain ether oxygen, to produce a CH2═C(R)CF3/SO3 adduct.
A process comprising contacting CH2═C(R)CF3 wherein R is CF3 with SO3 in the presence of a Lewis acid to produce a CH2═C(CF3)2/SO3 adduct.
Dependencies are inferred from the claim text.