Widely used as a chiral ligand in asymmetric catalysis, this compound plays a key role in enantioselective transformations such as hydrogenation and cross-coupling reactions. Its rigid xanthene backbone and stereodefined sulfinamide group enhance stereocontrol, making it valuable in the synthesis of chiral pharmaceuticals and fine chemicals. It is particularly effective in rhodium- and ruthenium-catalyzed reactions where high enantioselectivity is required. The phosphine moiety coordinates strongly to transition metals, stabilizing active catalytic species and improving reaction efficiency. Due to its tunable steric and electronic properties, it supports high yields and selectivity in complex molecule assembly.