Basf Se Corporation

Merial Limited

Alexander Korte

Michael Puhl

Martin Sukopp

Marco Coppola

Michael Rack

Michael Keil

Thomas Grote

Klaus Ebel

Thomas Zierke

Jan Klaas Lohmann

Horst Mayer

Maximilian Dochnahl

Tao Qu

Gunter Lipowsky

Willi Bieche

Paul Hornung

Stefan Fülster

Ralf Wazulek

Mark Alan Kearns

Jonathan O Smith

Stefan Fuelster

The present invention relates to a process for preparing substituted 2-nitrobiphenyls and to specific 2-nitrobiphenyls. The invention further relates to a process for preparing 2-aminobiphenyls from such 2-nitrobiphenyls and to a process for preparing (het)arylamides of such 2-aminobiphenyls.

Process for preparing substituted 2-nitrobiphenyls

The present invention relates to a process for the preparation of 2-[[[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxy]methyl]phenyl]-hydroxylamine from the correspondingly substituted nitrobenzene compound.

Process for preparing substituted N-phenylhydroxylamines

The present invention relates to a process for producing 2-halogenomethylphenyl acetic acid derivatives.

Method for producing 2-halogenomethylphenyl acetic acid derivatives

The present invention relates to a process for the preparation of a ring-substituted N-phenylhydroxylamine by reduction of the correspondingly substituted nitrobenzene compound, wherein the reduction is carried out by reacting the substituted nitrobenzene compound with hydrazine in the presence of a ruthenium catalyst.

The present invention relates to a novel process for the preparation of a compound of formula (I), wherein R, R, R, Rand Rare each independently selected from hydrogen, halogen, C-C-alkyl, C-C-haloalkyl, C-C-alkoxy, C-C-haloalkoxy, nitro, cyano, and pentafluorothio; Ris C-C-alkyl, or C-C-haloalkyl; by oxidation of a compound of formula (II) with an oxidation agent selected from trifluoroperacetic acid and trichloroperacetic acid in the presence of a catalyst selected from hydroxides, oxides, sulfates, acetates or trifluoroacetates of lithium, magnesium, calcium, strontium, barium, titanium (IV), zinc (II) and manganese (II).

Process for the preparation of 4-sulfinyl-pyrazole derivatives

The invention relates to a process for purifying trifluoromethanesulfinic acid by azeotropic distillation with an aromatic solvent, to processes for preparing purified trifluoromethanesulfinic acid and to the use of the purified trifluoronnethanesulfinic acid for preparing trifluoromethylsulfinylated pyrazole derivatives, especially fipronil.

Method for producing and purifying trifluoromethanesulfinic acid

The present invention refers to a process for the preparation of pyrazole derivatives of formula (I) wherein W is nitrogen or CR, R, R, Rand Rare each independently selected from hydrogen, halogen, C-C-alkyl, C-C-haloalkyl, C-C-alkoxy, C-C-haloalkoxy, RS(O)n, nitro, cyano, and pentafluorothio; Ris hydrogen, halogen, C-C-alkyl, C-C-haloalkyl, C-C-alkoxy, C-C-haloalkoxy, RS(O)n, nitro, cyano, pentafluorothio or phenyl which is unsubstituted or substituted by 1 to 5 members of the group consisting of halogen, C-C-alkyl, C-C-haloalkyl, C-C-alkoxy, C-C-haloalkoxy, RS(O)n, nitro, cyano, and pentafluorothio which are the same or different; Ris C-C-alkyl or C-C-haloalkyl; and n is 0, 1, or 2; characterized in that hydrazines of formula (II) wherein W, R, R, R, and Rare as defined for pyrazole derivatives of formula (I), are reacted with a compound of formula (III) 

Process for the preparation of pyrazole derivatives

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Neustadt, Germany

Alexander Korte