Used as a chiral bidentate phosphine ligand in asymmetric catalysis, enabling high enantioselectivity in transition metal-catalyzed reactions such as hydrogenation, cross-coupling, and hydrosilylation. Its rigid diazocine backbone and well-defined chiral environment enhance stereocontrol, making it valuable in the synthesis of enantiomerically pure pharmaceuticals and fine chemicals. Effective with rhodium, ruthenium, and palladium complexes, it supports efficient catalytic cycles with improved turnover and selectivity.