Used as a chiral ligand in asymmetric catalysis, particularly in enantioselective transformations such as hydrogenation and C–C bond-forming reactions. Its sterically bulky tert-butyl and methoxy substituents enhance stereocontrol, making it effective in promoting high enantioselectivity with transition metal catalysts. Commonly employed in pharmaceutical synthesis where precise chirality is critical. Also utilized in research for developing new asymmetric methodologies due to its stable phosphorus center and rigid dinaphthyl backbone.