Used as a chiral ligand in asymmetric catalysis, particularly in transition-metal-catalyzed reactions such as asymmetric hydrogenation and cross-coupling reactions. Its rigid dinaphthyl backbone and phosphorus center with defined stereochemistry enable high enantioselectivity in the synthesis of pharmaceutical intermediates and fine chemicals. Commonly employed in the production of optically active compounds where precise stereocontrol is critical. Also applied in research settings for developing new catalytic methodologies due to its stability under various reaction conditions and ability to coordinate with metals like rhodium, ruthenium, and palladium.