Patent ID: 6653485
Filing Date: 2003-11-25
Classification: B01J,C07B,C07C,C07F

Abstract:
A ligand represented by the formula or its enantiomer: wherein each X and Xâ€² is independently selected from the group consisting of: alkyl, aryl, substituted alkyl, substituted aryl, OR, SR, NR2, COOR, and halide; wherein each Z and Z1 is independently selected from the group consisting of: alkyl, aryl, substituted alkyl, substituted aryl, OR, SR, NR2, COOR a d halide; or wherein Z and Z1 together form the bridging group A-B-A1; wherein each Zâ€², Zâ€³, Z1â€² and Z1â€³ is independently selected from the group consisting of: H, alkyl, aryl, substituted alkyl, substituted aryl, OR, S, NR2, COOR, and halide; or wherein Zâ€² and Z together form the bridging group Aâ€²-B-A; Zâ€² and Z together form a fused cycloaliphatic or aromatic group; Z1 and Z1â€² together form the bridging group A1-B1-A1â€²; and/or Z1 and Z1â€² together form a fused cycloaliphatic or aromatic group; wherein each A, Aâ€², A1 and A1â€² is independently selected from the group consisting of: O, CH2, NH, NR, S, CO and a bond; wherein each B and B1 is independently selected from the group consisting of: O, CH2, NH, NR, S, CO, SO2, and a bond; wherein each T is independently selected from the group consisting of: alkyl, substituted alkyl, aryl, substituted aryl, alkoxide, aryloxide, R, Râ€², and Râ€³; or wherein two T groups together form an alkylene or arylene; wherein each Tâ€² is independently selected from the group consisting of: alkyl, substituted alkyl, aryl, substituted aryl, alkoxide, aryloxide, R, Râ€², and Râ€³; or wherein two Tâ€² groups together form an alkylene or arylene; wherein each R, Râ€²and Râ€³ is independently selected from th group consisting of: alkyl, substituted alkyl, aryl, aralkyl and alkaryl of 1 to 22 carbon toms; or wherein two R groups, two Râ€² groups or two Râ€³ group together form an alkylene, arelene or substituted arylene group; and wherein each Y, Yâ€² and Yâ€³ is independently selected from the group consisting of: CH2 and a bond between carbon and phosphorus; with the proviso that when the Y group at the 2â€² position is a bond between carbon and phosphorus, Xâ€² is hydrogen.