Clariant Corporation

Weylchem Frankfurt Gmbh

Clariant Speciality Fine Chemicals (Deutschland) Gmbh

Klaus Forstinger

Andreas Meudt

Daniel Decker

Michael Erbes

Andreas Martin

Angela Köckritz

Michael Kant

Andreas Maier

Alexander Hofmann

Reinhard Schwesinger

Daniel Schramm

Klemens Flick

Thomas Sommer

The present invention relates to a method for the preparation of phenols, in which an aryldiazonium salt, which is prepared by the diazotisation of a corresponding aromatic, primary amine, is decomposed by heating in a mixture containing hot water, a mineral acid and an organic solvent, wherein the organic solvent contains a ketone of formula (I) RC(O)R in which Rand Rindependently stand for (C-C)-alkyl and Rand Rtogether have at least four carbon atoms, wherein the aromatic primary amine is aniline or a substituted aniline, which contains at least one further substituent which is selected from: alkyl, alkenyl, alkynyl, halogen, haloalkyl, cycloalkyl, heteroaryl, carboxyl, cyan, alkoxyl and ester, and wherein substantially no copper salts are contained in the mixture.

Method for the preparation of phenols

The invention relates to a method for the production of an aromatic carbonyl compound by the oxidation of a methyl group or methylene group bonded to the aromatic group in which the aromatic substance is reacted in the presence of an oxidizing agent and a sulphoxide, a sulphoxide being selected for the oxidation of a specific aromatic substance whose ionization potential, in terms of magnitude, differs from the ionization potential of the aromatic substance to be oxidized by a maximum of &#xb1;0.25 eV.

Method for the production of aromatic carbonyl compounds

A process for preparing amines of the general formula (I)RRCHNRR&#x2003;&#x2003;(I)in which R, R, Rand Rare each independently hydrogen, straight-chain or branched, halogenated or halogen-free C-C-alkyl, C-C-cycloalkyl, C-C-aryl or C-C-aralkyl, by catalytic, hydrogenating amination of carbonyl compounds of the general formula (II)R&#x2014;C(&#x2550;O)&#x2014;R&#x2003;&#x2003;(II)with nitrogen compounds of the general formula (III)HNRR&#x2003;&#x2003;(III)in the presence of bifunctional catalyst systems comprising a.) a hydrogenation-active catalyst component comprising one or more metals of transition group 8 of the Periodic Table and b.) one or more solid, acidic cocatalysts, wherein the hydrogenating amination is carried out in the presence of aqueous ammonia or aqueous amine of the formula (III) and at least one organic solvent miscible with ammonia or the aqueous amine of the formula (III).

Process for reductively aminating ketones and aldehydes with aqueous amines and catalysts suitable therefor

A process for preparing compounds of the formula (II),where the substituents Rto Rare each independently H, CH, straight-chain or branched C&#x2013;C-alkyl, CH(OC&#x2013;C-alkyl), CH(C&#x2013;C-alkyl)(OC&#x2013;C-alkyl), CH(OC&#x2013;C-alkyl), CH(CH)(OC&#x2013;C-alkyl), C&#x2013;C-alkoxy, N(C&#x2013;C-alkyl), phenyl, substituted phenyl, aryl, heteroaryl, S(C&#x2013;C-alkyl) or a radical C, andthe symbols Xare each carbon or a maximum of two neighboring Xare nitrogen or XRand XRtogether are O, NH, N(C&#x2013;C-alkyl), N(C&#x2550;O&#x2014;C&#x2013;C-alkyl), N(SiR)or S,or where neighboring radicals Rto Rform the following structural unit,where Xto Xand Rto Rhave the same meaning as Xto Xand Rto Rwhich comprises reacting chloro- or fluoroaromatics of the formula (I) with carbon electrophiles and lithium metal.

Preparation of substituted aromatic compounds

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Babenhausen, Germany

Klaus Forstinger