Used as a chiral auxiliary in asymmetric synthesis, particularly in enantioselective alkylation and aldol reactions. Its rigid oxazolidinone ring and stereocenters help control the stereochemistry of newly formed chiral centers in pharmaceutical intermediates. Commonly employed in the synthesis of complex molecules where high enantiomeric excess is required. After serving its purpose, it can be cleaved under mild conditions without racemization, making it valuable in the production of active pharmaceutical ingredients.