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:
May. 11, 2010
Filed:
Sep. 01, 2005
Xumu Zhang, State College, PA (US);
Xumu Zhang, State College, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
The present invention provides a chiral ligand, represented by a formula or its enantiomer: X and X' can be independently O, NH, NR, NCOR or S; each of Z-Zand Z′-Z′ can be independently H, alkyl, aryl, substituted alkyl, substituted aryl, alkoxyl, aryloxyl, nitro, amide, aryoxide, halide, hydroxyl, carboxylate, hetereoaryl, or a cyclic alkene, fused aryl, or cyclic ether group formed from any two adjacent Z groups or any two adjacent Z′ groups; Y and Y′ can be independently OH, OR, NH, NHR, NR, SH, PR, OPR, NHPR, OP(OR), COOH, COOR, CONHR, or a linking group formed from Y and Y′ groups together. Processes of preparing these ligands, catalysts that employ them and methods of using the catalysts are also provided.