Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of protease inhibitors and other biologically active molecules. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for building chiral, nitrogen-containing rings. Commonly employed in the preparation of drug candidates targeting viral infections and central nervous system disorders due to its conformational rigidity and stereochemical stability. Also utilized in solid-phase and solution-phase peptide synthesis where controlled stereochemistry is required.