Ruthenium complexes having (P—P)—coordinated diphosphorus donor ligands and processes for preparing them

US8884044B2 · kind B2 · utility

Assignee

• UMICORE AG & CO. KG · DE

Inventors

• Andreas Rivas-Nass · Schriesheim, DE
• Ralf Karch · Kleinostheim, DE
• Roland Winde · Frankfurt, DE
• Angelino Doppiu · Seligenstadt, DE
• Tina Schneider · Langenselbold, DE

Key dates

• Filing date: Mar 26, 2009
• Grant date: Nov 11, 2014
• Expiry date: Jul 9, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/821
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to ruthenium complexes which have a chiral diphosphorus donor ligand and in which the ruthenium has the oxidation state (+11) and the chiral diphosphorus donor ligand has bidentate P—P coordination to the ruthenium. The ruthenium complexes are present in two forms (cationic type A and uncharged type B), are cyclic and have a four- to six-membered ring incorporating the diphosphorus donor ligand. The chiral diphosphorus donor ligands are selected from the group consisting of diphosphines, diphospholanes, diphosphites, diphosphonites and diazaphospholanes. Furthermore, processes for preparing the ruthenium complexes of types A and B, which are based on ligand exchange reactions, are described. The Ru complexes are used as catalysts for homogeneous asymmetric catalysis for preparing organic compounds.