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|1. (WO2001000581) LIGANDS BASED ON CHIRAL 2-AMINO-2'-HYDROXY-1,1'-BINAPHTHYL AND RELATED FRAMEWORKS FOR ASYMMETRIC CATALYSIS|
|Applicants:||THE PENN STATE RESEARCH FOUNDATION
|Title:||LIGANDS BASED ON CHIRAL 2-AMINO-2'-HYDROXY-1,1'-BINAPHTHYL AND RELATED FRAMEWORKS FOR ASYMMETRIC CATALYSIS|
The present invention includes array of new chiral ligands that are optically active or racemic. These ligands are bidentate, tridentate, tetradentate or pentadentate ligands which include P-P, P-N, N-N, mixed P-N, Schiff base or carbene sites. The present invention further includes a catalyst prepared by a process, which includes contacting a transition metal salt, or a complex thereof, and a ligand according to the present invention. The present invention still further includes a process for preparation of an asymmetric compound. In this process, a substrate capable of forming an asymmetric product by an asymmetric reaction and a catalyst according to the present invention are contacted to produce an asymmetric product. Transition metal complexes with these ligands are effective catalysts for asymmetric reactions. Applicant has discovered that asymmetric products can be prepared using the chiral catalysts according to the present invention in enantioselective reactions, such as hydrogenation, hydroformylation, Michael addition, Heck reaction, Aldol reaction, allylic alkylation, cyclopropanation, epoxidation, and olefin metathesis.