| 摘要 |
A chiral ligand represented by the formula and its enantiomer: Formula (I) wherein A, X, Y and Z are as defined in the specification is provided. Also provided is a process of making the chiral ligands and catalysts prepared from these ligands and a transition metal, a salt thereof or a complex thereof. In addition, a method of preparing an asymmetric compound by a transition metal catalyzed asymmetric reaction, such as, hydrogenation, hydride transfer reaction, hydrosilylation, hydroboration, hydrovinylation, hydroformylation, hydrocarboxylation, allylic alklylation, epoxidation, cyclopropanation, Diels-Alder reaction, Aldol reaction, ene reaction Heck reaction and Michael addition is provided. |
