Bayer Aktiengesellschaft

Lanxess Deutschland Gmbh

Forschungszentrum Juelich Gmbh

Arlanxeo Deutschland Gmbh

Saltigo Gmbh

Claus Dreisbach

Albrecht Marhold

Werner Obrecht

Markus Eckert

Thomas Prinz

Guido Giffels

Boris Bosch

Joachim Kralik

Inga Ritzkopf

Christian Steffens

Hans-Christian Militzer

Walter Lange

Andreas Stolle

Edwin Ritzer

Birgit Driessen-H&ouml;lscher

Uwe Stelzer

Christian Wandrey

Ruth Meissner

Rainhard Koch

Benjamin Meseguer

Wolfram Sirges

Ulrich Scholz

Andreas Bischoff

Björn Schlummer

Andreas Liese

Thomas Foellinger

Thomas Föllinger

Robert Sollner

Frank Jelitto

Christoph Larcher

Carel A G M Weijers

J Hans Visser

Birgit Drieben-Hölscher

Rommy Schneider

Frank Berendes

Nils Brinkmann

Jurgen Wiedemann

Stefan Schlenk

Martina Hoffmann

Friederike Agel

Birgit Drieβen-Hölscher

Murillo De Oliveira Villela Filho

Jan A M De Bont

Jan C Verdoes

Thomas FRÜH

The invention relates to a process for preparing 1,3-butadiene by means of ene-yne metathesis over at least one transition metal catalyst of the element ruthenium.

1,3-butadiene synthesis

The present invention relates to a process for preparing stereoisomerically enriched 3-heteroaryl-3-hydroxycarboxylic esters by reducing 3-heteroaryl-3-oxocarboxylic esters in the presence of ruthenium-containing catalysts.

Process for reducing 3-heteroaryl-3-oxopropionic acid derivatives

The invention relates to a process for preparing enantiomerically enriched aryl-aminopropanols and to their use and also to intermediates.

Process for preparing arylaminopropanols

The invention relates to a process for preparing enantiomer-enriched 3-heteroaryl-3-hydroxypropanoic acid derivatives and 3-heteroaryl-1-aminopropan-3-ols, and to their use.

Process for preparing 3-heteroaryl-3-hydroxypropanoic acid derivatives

By means of a new process for the resolution of racemic 3-aminopentanenitrile, enantiomerically enriched 3-aminopentanenitrile or its salts can be obtained. For this, racemic 3-aminopentanenitrile is reacted with an enantiomerically enriched organic acid and one of the two diastereomeric salts formed is separated off and then converted into the enantiomerically enriched 3-aminopentanenitrile or its salts.

Process for the racemate resolution of 3-aminopentanenitrile

The present invention relates to catalysts comprising chiral monophosphorus compounds and their use, the chiral monophosphorus compounds themselves and also their precursors.

Chiral monophosphorus compounds

The present invention relates to a process for the kinetic resolution of racemic functionalized epoxides in the presence of microorganisms, crude or pure preparations thereof comprising a polypeptide having epoxide hydrolase activity. Preferred microorganisms are yeasts and bacteria which may also be recombinant.

Process for the stereoselective preparation of functionalized vicinal diols

The invention relates to the biphenyldiols of the formula (V) The corresponding racemic and enantiomerically pure triflate compounds thereof, where Rand Rare H, Ris chlorine, and Ris methoxy. In an alternate embodiment, Rand Rare hydrogen and Rand Rare C-C-alkoxy, fluorine, or chlorine.

Biphenydiols

The invention relates to a novel process for preparing optically active trimethyllactic acid and/or its esters by catalytic hydrogenation of trimethylpyruvic acid and/or its esters in the presence of noble metal complex catalysts containing phosphorus ligands.

Process for preparing optically active trimethyllactic acid and its esters

Diphosphines

Process for the preparation of optically active amines

Dibenzyl carbonates are prepared by reacting a dialkyl carbonate with a benzyl alcohol in the presence of a basic catalyst and removing the highly volatile components and the catalyst from the reaction mixture. This process permits the preparation of benzyl carbonates in a simple manner, in good yields and without any particular technical safety arrangements.

Method for the production of dibenzyl carbonates

2-Methoxyethoxy-benzenes are obtained in an advantageous manner from the corresponding phenol compounds by reaction with 2-chloroethyl methyl ether if the process is carried out without the addition of a strong solvent at temperatures above 95&deg; C. and under pressure. The present invention also relates to novel 2-methoxyethoxybenzyl cyanides.

Process for the preparation of 2-methoxyethoxy-benzenes and novel 2-methoxyethoxy-benzyl cyanides

Growing community of inventors

Leichlingen, Germany

Claus Dreisbach