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:
Mar. 02, 2010
Filed:
May. 03, 2005
Matthias Lotz, Basel, CH;
Felix Spindler, Starrkirch-Wil, CH;
Matthias Lotz, Basel, CH;
Felix Spindler, Starrkirch-Wil, CH;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
Compounds of the formula (I) or (I'), where Ris a hydrogen atom or C-C-alkyl and R′is C-C-alkyl; Xand Xare each, independently of one another, a secondary phosphine group; Ris hydrogen, RRRSi—, C-C.acyl substituted by halogen, hydroxy, C-C-alkoxy or RRN—, -or R—X—C(O)—; R, Rand Rare each, independently of one another, C-C-alkyl, unsubstituted or C-C-alkyl or C-C-alkoxy-substituted C-C-aryl or C-C-aralkyl; Rand Rare each, independently of one another, hydrogen, C-C-alkyl, C-C-cycloalkyl, C-C-aryl or C-C-aralkyl, or Rand Rtogether are trimethylene, tetramethylene, pentamethylene or 3-oxapcntylene; Ris C-C-alkyl, unsubstituted or C-C-alkyl- or C-C-alkoxy-substituted C-C-cycloalkyl, C-C-aryl or C-C-aralkyl; Xis —O— or —NH—; T is C-C-arylene; v is 0 or an integer from 1 to 4; and * denotes a mixture of racemic or enantiomerically pure diastereomers or pure racemic or enantiomerically diastereomers, are excellent chiral ligands for metal complexes as enantioselective catalysts for the hydrogenation of prochiral organic compounds.