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:
Oct. 18, 2011
Filed:
Jan. 29, 2010
William Patrick Hems, Norwich, GB;
Gabriela Alexandra Grasa, Cambridge, GB;
William Patrick Hems, Norwich, GB;
Gabriela Alexandra Grasa, Cambridge, GB;
Johnson Matthey PLC, London, GB;
Abstract
Catalysts suitable for asymmetric hydrogenation reactions are described comprising the reaction product of a group 8 transition metal compound, a chiral phosphine and a chiral diamine of formula (I) in which R, R, Rand Rare independently hydrogen, a saturated or unsaturated alkyl or cycloalkyl group, an aryl group or a urethane or sulphonyl group and R, R, Rand Rare independently hydrogen, a saturated or unsaturated alkyl or cycloalkyl group, or an aryl group, at least one of R, R, Rand Ris hydrogen and A is a linking group comprising one or two substituted or unsubstituted carbon atoms.