Used as a key chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other bioactive molecules. Its epoxide ring allows for selective ring-opening reactions, enabling the introduction of functional groups in a stereocontrolled manner. The amine and Boc-protected groups facilitate peptide coupling and multistep synthesis, making it valuable in medicinal chemistry for constructing complex molecules with high enantiomeric purity. Commonly employed in the preparation of HIV protease inhibitors and renin inhibitors for hypertension treatment.