Used as a chiral bidentate ligand in asymmetric catalysis, particularly in rhodium- and ruthenium-catalyzed enantioselective hydrogenation reactions. It is highly effective in the synthesis of chiral molecules, especially in pharmaceutical and fine chemical industries where high enantiomeric purity is required. Its rigid benzene backbone and well-defined chiral environment enhance selectivity and catalytic efficiency. Commonly applied in the hydrogenation of prochiral olefins, imines, and ketones, leading to the production of optically active intermediates for drugs and agrochemicals.