Used as a chiral auxiliary in asymmetric synthesis, particularly in enantioselective alkylation and aldol reactions. Its rigid oxazolidinone structure helps control stereochemistry, making it valuable in the preparation of optically active pharmaceuticals and fine chemicals. Commonly employed in the synthesis of beta-amino acids and other bioactive molecules where high enantiomeric excess is required. The phenyl and dimethyl substituents enhance steric and electronic effects, improving selectivity. After serving its purpose, it can be cleaved under mild conditions without racemization, allowing for efficient recovery or further functionalization.