Abstract: The invention relates to the synthesis of bis trialkylsilylamide. The synthesis includes subjecting the amide to the action of a trialkylsilyl halide on an amide bearing a Rf group in the presence of a base whose halide, or halohydrate, is insoluble in the presence of a covalent and non-hydrophilic solvent. The invention is applicable to organic synthesis.

Abstract: A reagent comprising a compound of formula (I): Rf—M(X)(Z)n—Y—R, wherein R is a hydrocarbon radical advantageously having at most 10 carbon atoms and being selected from alkyls and aryls; Rf is a radical of formula II: R1—(C&Xgr;2)m—CF2—, where R1 is a fluorine or chlorine atom or a carbon radical, m is 0 or a integer from 0-12, and each &Xgr;, which may be the same or different, is a chlorine or preferably fluorine atom, with the proviso that when m is 0, R1 is electroattractive, preferably a fluorine atom; n is 0 or 1; M is a non-metal selected from carbon and chalcogens with an atomic number than oxygen; and each of X, Y and Z, which are the same or different, is a chalcogen; as well as a generator, for consecutive or simultaneous addition. The reagent is useful for organic synthesis.

Abstract: The invention relates to a nucleophilic reagent which is useful for grafting a substituted difluoromethyl group onto a compound containing at least one electrophilic function, or for the synthesis of oxysulphide-containing and fluorine-containing organic derivatives, wherein said reagent comprises: a) a fluorocarboxylic acid of formula Ew—CF2—COOH where Ew represents an electron-withdrawing atom or group, at least partially salified with an organic or inorganic cation, and b) a polar aprotic 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. A synthetic process uses this reagent by heating in order to graft a substituted difluoromethyl group onto various compounds.

Abstract: The invention relates to a nucleophilic reagent which is useful for grafting a substituted difluoromethyl group onto a compound containing at least one electrophilic function, or for the synthesis of oxysulphide-containing and fluorine-containing organic derivatives, wherein said reagent comprises:

Abstract: The invention concerns the synthesis of bis trialkylsilylamide which consists in: subjecting the amide to the action of a trialkylsilyl halide on an amide bearing a Rf group in the presence of a base whose halide, or halohydrate is insoluble in the medium and in the presence of a covalent and non-hydrophilic solvent. The invention is applicable to organic synthesis.

Abstract: Provided is a process for grafting a substituted difluoromethyl group onto a compound bearing at least one electrophilic substituent, comprising (i) contacting the compound bearing at least one electrophilic substituent with a nucleophilic reagent which comprises (a) a fluorocarboxylic acid having the formula Ea—CF2—COOH, wherein Ea is an electron-withdrawing atom or group, the fluorocarboxylic acid being at least partially salified with an organic or inorganic cation and (b) a polar aprotic solvent, and (ii) exposing the resulting medium of reaction to the action of microwave energy.

Abstract: A reagent comprising a compound of formula (I): R.sub.f --M(X) (Z).sub.n --Y--R, wherein R is a hydrocarbon radical advantageously having at most 10 carbon atoms and being selected from alkyls and aryls; R.sub.f is a radical of formula II: R.sub.1 --(C.XI..sub.2).sub.m --CF.sub.2 --, where R.sub.1 is a fluorine or chlorine atom or a carbon radical, m is 0 or a integer from 0-12, and each .XI., which may be the same or different, is a chlorine or preferably fluorine atom, with the proviso that when m is 0, R.sub.1 is electroattractive, preferably a fluorine atom;n is 0 or 1; M is a non-metal selected from carbon and chalcogens with an atomic number higher than oxygen; and each of X, Y and Z, which are the same or different, is a chalcogen; as well as a generator, for consecutive or simultaneous addition. The reagent is useful for organic synthesis.

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, andb) an aprotic polar solvent; andin 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.

Abstract: The invention relates to a process and a nucleophilic reagent which is useful for grafting a substituted difluoromethyl group onto a compound containing at least one electrophilic function, characterized in that it comprises:a) a fluorocarboxylic acid of formula Ew--CF.sub.2 --COOH where Ew represents an electron-withdrawing atom or group, at least partially salified with an organic or inorganic cation, andb) a polar aprotic 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.

Abstract: The subject of the present invention is a new catalytic system and a process for the synthesis of acid halides, especially from haloforms. This process for halogenating by means of a haloform is characterized by the use of a metal chloride, advantageously trivalent, as a catalyst, the solubility of which in the reaction mixture is at least equal to one millimole, preferably 1/100 mole per liter, and the metal chloride also being at least half, advantageously two-thirds and preferably three-quarters in the dissolved state.

Abstract: A process for the synthesis of fluorinated organic compounds and a reagent suitable for use in the process. The process is carried out by exchange with fluorides, while preferably agitating the reaction medium with ultrasonic sound.

Abstract: A process for the hydrogenation of halogenonitro-aromatic compounds wherein said compounds are contacted with a nickel-, cobalt- or iron-based catalyst, preferably Raney nickel, and hydrogen in the presence of a sulfur-containing compound. Preferably, the sulfur-containing compound is a sulfoxide or sulfone, and the molar ratio of the sulfur-containing compound to the catalyst ranges from about 1:1 to 10:1.

Abstract: Novel lubricant additives containing phosphorus and nitrogen and novel lubricant compositions containing between about 0.2 and 10 percent by weight of said additives are provided. The novel lubricant compositions possess improved wear-resistance and improved properties under extreme pressure.