Used as a chiral ligand in asymmetric catalysis, particularly in transition metal-catalyzed reactions such as hydrogenation, cross-coupling, and C–H activation. Its rigid, stereodefined structure enhances enantioselectivity, making it valuable in the synthesis of optically active pharmaceuticals and fine chemicals. The electron-donating methoxy groups and bulky tert-butyl substituents fine-tune the steric and electronic environment around the phosphorus center, improving catalyst performance and selectivity. Commonly employed in palladium and rhodium complexes for highly enantioselective transformations.