Rhone-poulenc Specialites Chimiques

Rhone-poulenc Chimie

Rhone-poulenc Industries

Rhone-poulenc Sante

Michel Desbois

Joel Richard

Roland Reeb

Camille Disdier

Gerard Soula

Bernard Langlois

Louis Amiet

Michel Reppelin

Michel Baudouin

Francoise Truchet

Francedillaoise Truchet

An aqueous emulsion comprising at least one (co)polymer is provided. The (co)polymer is derived from a monomer having formula (1):

Aqueous emulsion of (CO) polymer made from monomer containing isocyanate

Aqueous emulsion of (co)polymer made from monomer containing isocyanate

A process for the preparation of (pentafluoroethoxy)- and (pentafluoroethylthio)benzene derivatives either from phenol, thiophenol or from halobenzene. A halobenzene is reacted with trifluoroethanol or a phenol or a thiophenol is reacted with a compound of the formula CF.sub.3 --CH.sub.2 --O--R'. The product is chlorinated and the chlorinated product is fluorinated in liquid hydrofluoric acid in the presence of a Lewis acid. The compounds obtained by the process of the present invention are used as synthesis intermediates in the phytosanitary, pharmaceutical and veterinary industries, and are used in lubricants.

Processes for preparing pentafluoroethoxy- and

A process for the preparation of para-nitrophenol by bringing a phenyl ester of an inorganic acid into contact with a nitrating agent in the presence of liquid hydrofluoric acid and a hydrolysis of the nitrated product obtained is carried out either simultaneously or in sequence with the nitration.

Process for the preparation of para-nitrophenol

A process for preparing trifluoroacetic or trichloroacetic acid esters, wherein trifluoroacetic or trichloroacetic acid is brought together with a non-perfluorinated alcohol in liquid hydrofluoric acid and wherein the ester obtained is separated by decantation. The trifluoroacetic or trichloroacetic acid esters are used as synthesis intermediates in the pharmaceutical or the plant-protection industry.

Process for preparing trifluoroacetic or trichloroacetic acid esters

A process for the preparation of compounds containing a difluoromethylene group in a position .alpha. to an oxygen atom. An alcohol or a phenol is brought into contact with trifluoroacetic acid or a halide or anhydride thereof in anhydrous liquid hydrofluoric acid, in the presence of boron trifluoride, in a quantity such that the absolute pressure of boron trifluoride is at least about one bar. The compounds obtained according to the invention are used as synthesis intermediates in the pharmaceutical, plant-protection, and dye industries, as anesthetics and as additives for lubricating oils.

Process for preparing compounds containing a difluoromethylene group in

A process for the preparation of compounds containing a difluoromethylene or trifluoromethyl group. A compound containing a carbonyl group, preferbly an acid, acid halide, amide, ketone or any compound containing a perhaloalkylcarbonyl moiety is placed, in anhydrous liquid hydrofluoric acid, in contact with boron trifluoride in a quantity such that the absolute pressure of boron trifluoride in the reaction system is at least one bar for a time sufficient to convert the carbonyl group to a difluormethylene or trifluoromethyl group. The compounds obtained are useful as synthesis intermediates in the pharmaceutical, plant-protection and dye industries, as anesthetics or as heat-transfer and lubricating fluids.

Process for the preparation of compounds containing a difluoromethylene

A process for preparing hydroxylated aromatic compounds optionally bearing at least one trifluoromethyl, trifluoromethoxy or trifluoromethylthio group. A chloroformate or fluoroformate, optionally bearing at least one trihalomethyl-, trihalomethoxy- or trihalomethylthiophenyl group, is reacted with liquid hydrofluoric acid. The aromatic compounds obtained are useful as synthesis intermediates in the pharmaceutical or the plant-protection industry.

Process for preparing hydroxylated aromatic compounds

A process for the chlorination of aromatic derivatives. The aromatic derivative is reacted with chlorine gas in liquid hydrofluoric acid. The products obtained are useful as intermediates for the synthesis of compounds having a plant-protecting or pharmaceutical activity.

Process for the chlorination of aromatic derivatives

A process for the preparation of benzophenones. A compound of the formula COX.sub.4 X.sub.5, where X.sub.4 and X.sub.5, which may be identical or different are halogen atoms, is reacted, in liquid hydrofluoric acid, with a deactivated benzene derivative, in the presence of boron trifluoride in such amount that the absolute pressure of boron trifluoride in the reaction space is at least one bar.

Process for the preparation of benzophenones

A process for the stimulaneous halogenation and fluorination of aromatic derivatives substituted by at least one group containing a halogenoalkyl unit. The aromatic derivative is reacted with the halogen in liquid hydrofluoric acid. The products obtained are useful as intermediates for the synthesis of compounds having a plant-protecting or pharmaceutical activity.

Process for the simultaneous halogenation and fluorination of aromatic

A process for sulfonylation of halobenzenes, in which a halobenzene is reacted with a sulfonic acid, a precursor or a derivative thereof in the presence of boron trifluoride in an amount such that the absolute pressure of boron trifluoride within the reaction vessel exceeds 1 bar, and in the presence of hydrofluoric acid as a solvent. The resultant products are useful as intermediates in the synthesis of compounds having a phytosanitary (e.g., herbicidal) or pharmaceutical activity.

Process for sulfonylation of halobenzenes

A process for the preparation of .alpha.,.alpha.-difluoroalkoxy or .alpha.,.alpha.-difluoroalkylthiophenyl sulfones, in which a polyhaloalkoxybenzene or a polyhaloalkylthiobenzene is reacted with a sulfonic acid, a derivative or a precursor of this acid, in the presence of boron trifluoride in an amount such that the absolute pressure of the boron trifluoride within the reaction vessel exceeds 1 bar, and in the presence of hydrofluoric acid as a solvent. The resultant products are useful as intermediates in the synthesis of compounds having a phytosanitary (e.g., herbicidal) or pharmaceutical activity.

Process for preparation of .alpha.,.alpha.-difluoroalkoxy or .alpha.,.alpha

The N-benzylimides having the structural formula: ##STR1## wherein Ar comprises a benzene radical and R.sub.1 is an aliphatic or aromatic hydrocarbon, are prepared in good yield by reacting a compound having the structural formula:

Preparation of N-benzylimides

A process for the acylation of halo- or trihalomethylbenzenes, wherein a halo- or trihalomethylbenzene is reacted with a carboxylic acid, a precursor or a derivative thereof in the presence of boron trifluoride in an amount such that the absolute pressure of the boron trifluoride within the reaction vessel exceeds 1 bar, and in the presence of hydrofluoric acid as a solvent. The resultant products are useful as intermediates in the synthesis of compounds having a phytosanitary (e.g., herbicidal) or pharmaceutical activity.

Growing community of inventors

Rillieux, France

Michel Desbois