Used as a highly specialized ligand in asymmetric catalysis, particularly in transition metal-catalyzed reactions where precise stereochemical control is required. Its sterically bulky aryl groups and chiral dioxaphosphepine backbone make it effective in enantioselective transformations such as hydrogenations, C–C bond formations, and cycloadditions. Commonly employed in research and pharmaceutical synthesis to achieve high enantiomeric excess. Due to its complex structure, it is typically reserved for reactions where standard ligands fail to provide adequate selectivity or yield.