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:
Jul. 29, 2014
Filed:
May. 01, 2008
Wolfgang Hell, Aachen, DE;
Markus Kegel, Aachen, DE;
Helmut Buschmann, San Just Desvem, ES;
Felix Spindler, Starrkirch-Wil, CH;
Detlef Heller, Rostock, DE;
Hans-joachin Drexler, Gross-Schwass, DE;
Wolfgang Hell, Aachen, DE;
Markus Kegel, Aachen, DE;
Helmut Buschmann, San Just Desvem, ES;
Felix Spindler, Starrkirch-Wil, CH;
Detlef Heller, Rostock, DE;
Hans-Joachin Drexler, Gross-Schwass, DE;
Gruenenthal GmbH, Aachen, DE;
Abstract
Compounds of the formula II can be hydrogenated to the corresponding butane derivatives in the presence of homogeneous cataslysts composed of metal salts or complexes containing metals selected from the group consisting of Rh, Ir, and Ru and preferably containing diphosphine ligands, with, in addition, excellent optical yields being achieved when one of Rand Ris not a hydrogen atom and the diphosphine ligand is chiral.