Saltigo Gmbh

Degussa Aktiengesellschaft

Degussa Gmbh

Bayer Cropscience Ag

Celanese Gmbh

Umicore Ag & Co Kg

Aventis Research & Technologies Gmbh & Co Kg

Omg Ag & Co Kg

Saltigogmbh

Evonik Degussa Gmbh

Alexander Zapf

Matthias Beller

Thomas Schareina

Thomas Riermeier

Ralf Karch

Wolfgang Mägerlein

Axel Monsees

Matthias Gotta

Oliver Briel

Alain Cotté

Nikolaus Müller

Thomas Himmler

Sergii Pazenok

Ralf Jackstell

Christian Funke

Uwe Dingerdissen

Kai Rossen

Renat Kadyrov

Sandra Bogdanovic

Juan Jose Almena Perea

Christoph Schotes

Bernd Kayser

Mark Sundermeier

Jurgen Krauter

Ingo Kleinw&auml;chter

Mario G&oacute;mez-Andreu

Christa Fuhrmann

Theresia Elisabeth Ehrentraut, Legal Representative

Wilhelm Hubert Ehrentraut, Legal Representative

Anja Frisch

Kumaravel Selvakumar

Stefan Klaus

Wolf-Ruediger Krahnert

Nikolaus Muller

Xiao-Feng Wu

Andreas Ehrentraut

A process for preparing 2-alkyl-4-trifluoromethyl-3-alkylsulfonylbenzoic acids of the formula (I) is described. Here, the substituents are radicals such as alkyl and substituted phenyl.

Method for synthesizing 2-alkyl-4-trifluoromethyl-3-alkylsulfonylbenzoic acids

The present invention relates to a process for the production of trifluoromethylated unsubstituted or substituted aryl or heteroaryl compounds which comprises reacting an unsubstituted or substituted aryl or heteroaryl halide with a trifluoroacetate of formula (I) or (II), wherein Ris hydrogen or a C-Calkyl group and M an alkali metal or an ammonium ion,in the presence of and an anorganic halogenide salt or a trifluoroacetacid salt as activator compound and a catalytic combination of a copper salt with a monodentate, bidentate or tridentate aromatic or aliphatic amine or pyridine ligand.

Copper-catalysed process for the production of substituted or unsubstituted trifluormethylated aryl and heteroaryl compounds

A process is described for catalytically preparing optionally substituted aromatic or heteroaromatic nitrites of the general formula (I)Ar&#x2014;CN&#x2003;&#x2003;(I)by reacting the corresponding aryl halides of the general formula (II)Ar&#x2014;X&#x2003;&#x2003;(II)in which where

Process for catalytically preparing aromatic or heteroaromatic nitriles

Described is a process for preparing diaryl ethers of the formula (I)Ar&#x2014;O&#x2014;Ar'&#x2003;&#x2003;(I) In which Ar is an aryl or substituted aryl group and Ar&#x2032; is an aryl, substituted aryl, heteroaryl or substituted heteroaryl group, by reacting an aryl of formula (II) or a aryloxy salt of formula (III)Ar&#x2014;OH&#x2003;&#x2003;(II)Ar&#x2014;OR&#x2003;&#x2003;(III) In which Ar has the same meaning as in formula (I) and R is an alkali metal, with an aryl or heteroaryl bromide of formula (IV)Ar&#x2032;&#x2014;Br&#x2003;&#x2003;(IV) In which Ar&#x2032; has the same meaning as in formula (I), characterized in that the reaction is carried out in the presence of a copper(I)salt and a 1-substituted imidazole as catalyst system.

Process for the catalytic synthesis of diaryl ethers

The present invention relates to a process for preparing optionally substituted aromatic or heteroaromatic nitriles starting from haloaromatics. These are reacted in a copper-catalysed reaction with potassium hexacyanoferrate(II) or potassium hexacyanoferrate(III) in the presence of heteroaromatic amines.

The present invention relates to novel nitrogen-containing monodentate phosphane ligands of formula (I) and to their use in catalytic reactions, especially in the improvement of haloaromatic compounds. 

Nitrogen-containing monodentate phosphines and their use in catalysis

(Hetero)aromatic are prepared from halogen-substituted (hetero)aromatic compounds in the presence of a base and a palladium catalyst having a nonpyrophoric monodentate phosphane ligand. The phosphane ligand structure includes two radical groups having a tertiary carbon attached directly to phosphorous and one radical group having a primary carbon attached to the phosphorous.

Process for the preparation of aromatic aldehydes

The invention relates to novel monocarbene complexes of nickel, palladium or platinum with electron-deficient olefin ligands, to their preparation and to their use in the homogeneous catalysis of organic reactions.

Nickel-carbene, palladium-carbene and platinum-carbene complexes, their production and use in catalytic reactions

The present invention is directed to phosphine ligands and the use of such ligands in catalytic complexes with transition metals. The catalysts may be used in a variety of reactions and are especially useful for refining halogenoaromatics.

Production of novel phosphane ligands and use in catalytical reactions

Process for the preparation of mono-, bi- or poly-functional biaryls

Method of producing biaryls

The invention relates to process for preparing monofunctional, bifunctional or/and polyfunctional olefins of the formulae (Ia), (Ib), (Ic) or/and (Id),

Process for preparing aromatic olefins in the presence of palladium catalysts comprising phosphite ligands

Phosphanes, their method of production and use in metal complexes

Growing community of inventors

Rostock, Germany

Alexander Zapf