Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of enantiomerically pure amines and amino acids. Its structure allows for high stereoselectivity during nucleophilic addition reactions, making it valuable in pharmaceutical synthesis where specific enantiomers are required for drug activity. Commonly employed in the formation of carbon-carbon bonds, it helps control stereochemistry in complex molecule assembly, especially in research and development of active pharmaceutical ingredients (APIs). After serving its role, the auxiliary can be cleaved under mild conditions, leaving the desired chiral amine intact.