Used as a chiral auxiliary or intermediate in asymmetric synthesis, particularly in the preparation of enantiomerically pure pharmaceuticals. Its rigid imidazolidine structure and stereoselective properties make it valuable in controlling stereochemistry during carbon-carbon bond formation or reduction reactions. Commonly employed in the development of active pharmaceutical ingredients (APIs) where high enantiomeric excess is required. The tert-butyl carbamate (Boc) group allows for easy introduction and removal during synthetic sequences, enhancing its utility in multi-step organic synthesis.