Fluorosulfates of hexafluoroisobutylene and its higher homologs and their derivatives
AssigneeE.I. du Pont de Nemours and Company
InventorsVictor Cherstkov, Nina Delyagina, Viacheslav Petrov, Weiming Qiu, 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.
Claims10
A process comprising contacting CH2═C(R)CF2OSO2F with a nucleophile, 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 substitution product.
A process comprising contacting CH2═C(CF2OSO2F)2 with a first nucleophile to produce a substitution product.
A process comprising contacting CH2═C(CF2OSO2F)2 with a first nucleophile and then with a second nucleophile, different from said first nucleophile, to produce a substitution product.
Dependencies are inferred from the claim text.