Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Degussa Gmbh

Axel Monsees

Thomas Riermeier

Renat Kadyrov

Uwe Dingerdissen

Jens Holz

Juan Jose Almena Perea

Matthias Beller

Paul Knochel

Armin Boerner

Juan Almena

Karlheinz Drauz

Christoph Fleckenstein

Alexander Zapf

Herbert Plenio

Harald Trauthwein

Boris E Bosch

Carsten A Schneider

Matthias Lotz

Ralf Jackstell

Kai Rossen

Armin Börner

Kathrin Junge

Thorsten Sell

Sabine Laschat

Juan José Almena Perea

Eike Hupe

Stefan Klaus

Wolf-Ruediger Krahnert

Mark Sundermeier

Ilias Ilaldinov

Odalys Esperanza Zayas Vargas

The invention is directed to a phosphine compound represented by general formula (1) wherein R' and R&#x2033; independently are selected from alkyl, cycloalkyl and 2-furyl radicals, or R&#x2032; and R&#x2033; are joined together to form with the phosphorous atom a carbon-phosphorous monocycle comprising at least 3 carbon atoms or a carbon-phosphorous bicycle; the alkyl radicals, cycloalkyl radicals, and carbon-phosphorous monocycle being unsubstituted or substituted by at least one radical selected from the group of alkyl, cycloalkyl, aryl, alkoxy, and aryloxy radicals; Cpis a partially substituted or completely substituted cyclopentadien-1-yl group, including substitutions resulting in a fused ring system, and wherein a substitution at the 1-position of the cyclopentadien-1-yl group is mandatory when the cyclopentadien-1-yl group is not part of a fused ring system or is part of an indenyl group. Also claimed is the use of these phosphines as ligands in catalytic reactions and the preparation of these phosphines. 

Cyclopentadienyl, indenyl or fluorenyl substituted phosphine compounds and their use in catalytic reactions

Disclosed herein are phosphine compounds represented by the general formula (4): and corresponding phosphonium salts represented by the general formula (4a): Also disclosed are processes for the preparation of these phosphines and phosphonium salts as well as their use as ligands in catalytic reactions.

The present invention is based on new ligand systems of the general formula (I). These ligand systems can be used advantageously in transition metal-catalyzed asymmetric syntheses. Likewise encompassed are the transition metal complexes thus prepared, a process for preparing the ligands and the use of the complexes in asymmetric synthesis. 

Unsymmetrically substituted phospholane catalysts

The present invention concerns novel bidentante optionally N-containing P-ligands of general formula (I) embracing a two-ring-system and processes for synthesizing them, transition metal complexes of these compounds and their use as catalysts.

Cycloolefin phosphine ligands and their use in catalysis

The present invention is directed to a process for preparing compounds of the general formula (I). Compounds of the general formula (I) are advantageous precursors for preparing phospholane catalysts, especially bisphospholane catalysts. The invention therefore likewise provides for the use of the substances in question for preparing these catalysts. 

Halophospholanes and their preparation

The present invention relates to ligands of the general formula (I). In addition, a process for the production thereof and the use thereof are demonstrated.

Bisphosphines as bidentate ligands

The present invention relates to novel nitrogen-containing monodentate phosphane ligands of formula (I) and to their use in catalytic reactions, especially in the improvement of haloaromatic compounds. 

Nitrogen-containing monodentate phosphines and their use in catalysis

(Hetero)aromatic are prepared from halogen-substituted (hetero)aromatic compounds in the presence of a base and a palladium catalyst having a nonpyrophoric monodentate phosphane ligand. The phosphane ligand structure includes two radical groups having a tertiary carbon attached directly to phosphorous and one radical group having a primary carbon attached to the phosphorous.

Process for the preparation of aromatic aldehydes

The invention relates to novel chiral ligands of formula (I), the production thereof and the use of the same in catalytic reactions.

Chiral ligands, transition metal complexes thereof, and the catalytic use of the same

The present invention concerns novel unsymmetrical chiral diphosphines of a mixed aliphatic-aromatic type and processes for synthesizing them, complexes of these compounds and their use as catalysts.

Cycloaliphatic/aromatic diphosphines and use thereof in catalysis

The invention relates to ferrocenyl ligands of general formula (II), the S,S-enantiomer or the R,R-enantiomer of the ferrocenyl ligands of formula (II) being enriched, and a method for producing such ligands.

Ferrocenyl ligands and method for the production of such ligands

The invention relates to bidentate organophosphorous ferrocenyl ligands containing ligands of formula (I), to their complex compounds and to their utilization in catalytic processes.

Ferrocenyl ligands and the use thereof in catalysis

Bidentate organophosphorous ligands and their use

Chiral, unsymmetrical bidentate organophosphorus ligands of the formula (I) are reacted with transition metal centers to form complexes with catalytic activity. The compounds contain chiral bicycloaliphatic skeletons. Synthesis of the bidentate ligands proceeds from norbornyl derivatives.

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Frankfurt-am-Main, Germany

Axel Monsees