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 stereochemistry is critical. The sulfinyl group acts as a directing group and can be easily removed or modified after the key transformation, enabling efficient synthetic routes to complex bioactive molecules. Widely employed in research and industrial drug development for constructing chiral centers with high optical purity.