US 5,859,288 A · Reagent and process for the synthesis of oxysulphide-containing fluorine-containing organic derivatives

Abstract

The invention relates to a reagent which is useful for the synthesis of oxysulphide-containing fluorine-containing organic derivatives by reacting with an oxide of sulphur, especially sulphur dioxide, characterized in that it comprises: a) a fluorocarboxylic acid of formula E.sub.w --CF.sub.2 --COOH where E.sub.w is an electron-withdrawing group or atom which is at least partially salified by an organic or inorganic cation, and b) an aprotic polar solvent; and in that the content of releasable protons carried by its various components, including their impurities, is at most equal to half the initial molar concentration of the said fluorocarboxylic acid. This reagent can be used by heating in order to form fluorine-containing sulphinic or sulphonic acids.

Claims19

Dependent claims

A process for the synthesis of a salt of an organic compound which is both fluorine-containing and oxysulphide-containing, comprising the steps of:

a) forming a mixture of (1) a reagent comprising a fluorocarboxylic acid of formula Ew--CF.sub.2 --COOH where Ew is an electron-withdrawing group or atom which is at least partially salified by an organic or inorganic cation, and an aprotic polar solvent;
and (2) an oxide of sulphur;
and
b) heating the resulting mixture at a temperature of between 100.degree. C. and 200.degree. C., for a period of between half an hour and 20 hours.

1 more element

Dependencies are inferred from the claim text.

Reagent and process for the synthesis of oxysulphide-containing fluorine-containing organic derivatives

Life of this patent

Reagent and process for the synthesis of oxysulphide-containing fluorine-containing organic derivatives

Life of this patent

Abstract

Claims19