Technical Notes:
1.. Biary bisphosphine ligand. The Hg-BINAP ligand, as the ruthenium complex, catalyzes hydrogenation of unsaturated carboxylic acids to a higher ee than does BINAP. (Ref. 1,2)
2. The ruthenium catalyzed hydrogenation of aryl propenoic acid to produce the drug lbuprofen.
References: 1. J. Org. Chem., 1996, 61, 5510. 2.Topics Organometal. Chem. 2004, 6, 63 (review).