Saltigo Gmbh

Bayer Cropscience Ag

Saltigogmbh

Thomas Schareina

Matthias Beller

Alexander Zapf

Alain Cotté

Wolfgang Mägerlein

Matthias Gotta

Nikolaus Müller

Thomas Himmler

Sergii Pazenok

Christian Funke

Christoph Schotes

Xiao-Feng Wu

Nikolaus Muller

Alexsander Zapf

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.

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Cammin, Germany

Thomas Schareina