Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of β-lactam antibiotics. It facilitates stereocontrol during carbon-carbon bond formation, enabling high enantioselectivity in alkylation and aldol reactions. Commonly employed in pharmaceutical intermediates synthesis where precise stereochemistry is critical. Its rigid oxazolidinone ring enhances facial selectivity when reacting with electrophiles. After serving its purpose, it can be cleaved under mild conditions without racemization, making it ideal for multi-step drug synthesis.