Used as a chiral catalyst ligand in asymmetric synthesis, particularly in enantioselective transformations such as hydrogenation and cross-coupling reactions. Its rigid dinaphthyl backbone and phosphorus center with defined stereochemistry enable high enantioselectivity in the production of pharmaceutical intermediates and fine chemicals. The presence of electron-withdrawing nitro groups enhances ligand stability and influences metal coordination, improving catalytic efficiency. Commonly employed with transition metals like palladium, rhodium, or iridium in homogeneous catalysis.