Used as a chiral auxiliary or intermediate in asymmetric synthesis, particularly in the development of enantiomerically pure pharmaceuticals. Its rigid imidazolidinone core provides stereochemical control in reactions such as aldol condensations, alkylations, and cyclizations. Commonly employed in organocatalysis and peptide mimetic synthesis due to its ability to direct facial selectivity in bond-forming steps. The trifluoroacetic acid salt enhances solubility in polar organic solvents, facilitating its use in solution-phase synthesis. Also applied in the preparation of bioactive molecules where stereochemistry is critical for activity.