Used as a chiral ligand in asymmetric catalysis, particularly in enantioselective organic transformations such as aldol reactions, Diels-Alder reactions, and allylic alkylations. Its rigid binaphthyl backbone and defined stereochemistry enable high enantioselectivity, making it valuable in the synthesis of pharmaceutical intermediates and fine chemicals. Often employed with metal complexes like titanium or aluminum to form active catalytic species. Also applied in the development of chiral sensors and materials requiring optical activity.