Used as a chiral auxiliary in asymmetric synthesis, particularly in the enantioselective preparation of complex organic molecules. Its rigid imidazolidinone core and defined stereochemistry enable high stereocontrol in reactions such as alkylations, aldol additions, and Michael additions. Commonly employed in pharmaceutical synthesis where precise stereochemistry is critical. The tert-butyl and benzyl groups enhance steric shielding and stability, improving selectivity. After serving its role, it can be cleaved under mild conditions to yield enantiomerically enriched products without racemization.