Basf Aktiengesellschaft

Norbert Zimmermann

Johannes P Dix

Manfred Herrmann

Ralf Brueckmann

Erich Kromm

Klaus Taeger

Willi Bury

Rolf Fikentscher

Rainer Stürmer

Thomas Friedrich

Ulf Baus

Wolf-Dieter Kermer

Eberhard Beckmann

Stefan Erren

Herbert Leiter

Eva-Marie Borschel

Waldemar Dlugosch

Herbert Letter

The invention relates to methods for reacting (di)amines as substrates in the presence of a lysine oxidase arid a reducing agent, resulting in alcohols, diols or cyclic secondary amines. In a particular embodiment, the invention is directed to methods of preparing cyclic secondary amines suitable for ultimately synthesizing piperidine-2-carboxylic acid and proline derivatives, useful, for example as thrombin inhibitors.

Reaction of (di)amines in the presence of a lysine oxidase and of a reducing agent

Sulfonated and oxidized indene polymers

Condensates of arenesulfonic acids and formaldehyde are prepared by sulfonating arenes obtainable by thermal cracking of a naphthenic residue oil and fractional distillation of the cracked products of the fraction obtained at 100-120.degree. C. under atmospheric pressure, sulfonating this aromatics fraction with oleum at 120.degree.-160.degree. C. using an amount of from 0.7 to 1.2 parts by weight of oleum having an SO.sub.3 content of 24% by weight per part by weight of aromatics fraction, and subsequently condensing the arenesulfonic acids with formaldehyde in a conventional manner, and are used as dispersants, in particular for preparing dye formulations.

Preparation of condensates of arenesulfonic acids and formaldehyde and

Dispersants of increased bioeliminability or biodegradability for use in dye and pigment preparations, as tanning aids, in plastics production and in crop protection formulations contain from 3 to 50% by weight of one or more aromatic or long-chain aliphatic carboxylic acids, salts thereof or anhydrides thereof or a mixture thereof.

Dye dispersants: aryl sulphonic acid-formaldehyde condensate or

Chemically modified proteins obtainable by reacting casein, collagen, gelatin, albumin or mixtures thereof

Chemically modified proteins and colorant formulations containing the

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Waldsee, Germany

Norbert Zimmermann