Used as a chiral ligand in asymmetric catalysis, particularly in transition metal-catalyzed reactions such as hydrogenation and cross-coupling. Its phosphine oxide group can be reduced to a corresponding phosphine, enabling the formation of highly enantioselective catalysts. The compound’s rigid benzo[d][1,3]oxaphosphole backbone and stereogenic centers enhance stereocontrol, making it valuable in the synthesis of enantiomerically pure pharmaceuticals and fine chemicals. The tert-butyl and benzyloxy substituents provide steric bulk and stability, improving catalyst performance and selectivity.