Used as a ligand in transition metal catalysis, particularly in palladium-catalyzed cross-coupling reactions. Enhances catalyst stability and selectivity in organic synthesis. Employed in the production of fine chemicals, pharmaceuticals, and agrochemicals where precise stereochemical control is required. Also serves as an intermediate in the preparation of other phosphine-based ligands and organophosphorus compounds. Its steric bulk and electron-donating properties make it suitable for promoting challenging coupling reactions.