Used as a key chiral intermediate in the synthesis of pharmaceutical agents, particularly in the development of angiotensin II receptor antagonists for the treatment of hypertension. Its structural features allow for selective binding and improved metabolic stability in final drug compounds. The Boc-protected amine and cyanoaryl moieties facilitate stepwise peptide-like coupling and functional group transformations in multi-step organic syntheses. Commonly employed in medicinal chemistry for constructing complex bioactive molecules with high enantiomeric purity.