Used as a chiral ligand in asymmetric catalysis, particularly in transition-metal-catalyzed reactions such as hydrogenation and cross-coupling. Its rigid dinaphthyl backbone and stereodefined phosphorus center enable high enantioselectivity. Commonly employed in the synthesis of pharmaceuticals and fine chemicals where precise stereochemical control is required. Effective in palladium- and rhodium-based catalytic systems for forming chiral centers in complex organic molecules.