Technical Notes:
1.See 15-1232
2. Ligand used in the enantioselective rhodium catalyzed low pressure high activity hydrogenation of a dehydroaminoesters, enamides, and dimethylitaconate. See 15-1234
3. Ligand used in iridinium-catalyzed asymmetric hydrogenation of 2-methylindole.
References: 1.J. Org. Chem.. 2005, 70, 943. 2. Tetrahedron Lett, 2014 55, 3613.