The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2014
Filed:
Mar. 26, 2009
Andreas Rivas-nass, Schriesheim, DE;
Ralf Karch, Kleinostheim, DE;
Roland Winde, Frankfurt, DE;
Angelino Doppiu, Seligenstadt, DE;
Tina Schneider, Langenselbold, DE;
Andreas Rivas-Nass, Schriesheim, DE;
Ralf Karch, Kleinostheim, DE;
Roland Winde, Frankfurt, DE;
Angelino Doppiu, Seligenstadt, DE;
Tina Schneider, Langenselbold, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
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.