Preparation of perfluorovinyl ether sulfinic acids and their salts

摘要

There is provided a process for preparing a perfluorovinyl ether sulfinate, comprising: a) providing a perfluorovinyl ether sulfonyl halide; and (b) reducing the perfluorovinyl ether sulfonyl halide with a reducing agent in an organic protic solvent.

主权项

1. A process comprising:
a) providing a perfluorovinylether sulfonyl halide represented by the following formula (I):
CF2═CF—O—R—CFX—SO2—Ywherein Y is Cl or F, X is F or a linear or branched perfluorinated alkyl group, and R is a linear or branched perfluorinated linking group, which may be saturated or unsaturated, substituted or unsubstituted; and b) reducing the perfluorovinylether sulfonyl halide with a reducing agent in an organic protic solvent to provide a perfluorovinylether sulfinate, wherein the reducing agent is represented by one of formula (II) and formula (III), wherein formula (II) is:
MBHn(R′)4-n wherein n is 1, 2, 3, or 4, M is an alkali metal, and R′ is R″, OR″, OH, or OC(O)R″, wherein R″ is a C1 to C6 linear or branched alkyl group; andor
formula (III) is:
Alx(ByHz)w wherein x is 0 or 1, y is 1 or 2, z is 3, 4, 5, or 6, and w is 1, 2, or 3.