Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of enantiomerically pure amines and amino derivatives. Its stereochemical control makes it valuable in pharmaceutical synthesis where specific enantiomers are required for optimal biological activity. Commonly employed in organometallic additions to imines, enabling high diastereoselectivity. After serving its role, it can be cleaved under mild acidic conditions, leaving the desired chiral amine intact. Widely applied in research and development of active pharmaceutical ingredients (APIs) due to its reliability and efficiency in stereoselective transformations.