Technical Notes:
1. Biaryl bisphosphine ligand with narrow dihedral angle. The DM-SEGPHOS"? ligand, as the ruthenium complex, gives superior enantioselectivity and diastereoselectivity in the asymmetric hydrogenation of a-sub stituted-?-ketoesters. See 15-0066.
2. Ruthenium catalyzed enantioselective synthesis of ? amino acids by hydrogenation.
References:
1. US. Pat. 7626034
Strem