Bidentate organophosphorous ligands and their use

US6573389B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Boris Bosch
• Harald Trauthwein · Munich, DE
• Thomas Riermeier · Wemding, DE
• Uwe Dingerdissen · Seeheim-Jugenheim, DE
• Axel Monsees · Frankfurt, DE

Key dates

• Filing date: Dec 6, 2001
• Grant date: Jun 3, 2003
• Expiry date: Dec 6, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/847
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to unsymmetric bidendate organophosphorus ligands of the formula (I) which have a modular structure and have a trivalent phosphine function and a second trivalent phosphorus group which is bound via a heteroatom to a chiral ligand framework,R1R2PZC*HR3XP(YR4)(YR5)  (I)whereX is —O—, —S— or —NR6—,Y is a direct phosphorus-carbon bond, —O— or —NR7—,Z represents 1 to 6 carbon atoms which are joined by single or double bonds and link the phosphine unit PR1R2 to the carbon center C*, andP is trivalent phosphorus.The invention also relates to complexes comprising such a chiral ligand system of the formula (I).