Used as a chiral ligand in asymmetric catalysis, particularly in transition-metal-catalyzed reactions such as asymmetric hydrogenation and cross-coupling reactions. Its rigid anthracenyl backbone and stereogenic centers enhance enantioselectivity, making it valuable in the synthesis of optically active pharmaceuticals and fine chemicals. The phosphine oxide group can be reduced to the corresponding phosphine, enabling its use in palladium- or rhodium-based catalytic systems. Its steric bulk from tert-butyl groups helps control metal coordination geometry, improving reaction selectivity.