Used as a chiral bidentate phosphine ligand in asymmetric catalysis, particularly in enantioselective hydrogenation and cross-coupling reactions. Its sterically hindered, electron-rich structure enhances metal complex stability and promotes high enantioselectivity with transition metals like rhodium, ruthenium, and palladium. Commonly employed in the synthesis of fine chemicals, pharmaceuticals, and agrochemicals where precise stereochemical control is critical. The dioxine backbone provides rigidity, improving chiral induction, while the methoxy and tert-butyl groups contribute to solubility and prevent unwanted side reactions.