Used as a chiral catalyst ligand in asymmetric synthesis, particularly in enantioselective transformations such as hydrogenation and cross-coupling reactions. Its rigid dinaphthyl backbone and phosphorus center with tailored electronic properties enable high stereocontrol, making it valuable in pharmaceutical and fine chemical manufacturing where specific enantiomers are required. The trifluoromethanesulfonamide group enhances stability and influences coordination behavior with transition metals.