Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of peptide-based drugs and protease inhibitors. Its protected amine and carboxylic acid groups allow for selective coupling reactions, making it valuable in solid-phase and solution-phase peptide synthesis. Commonly employed in the preparation of active pharmaceutical ingredients (APIs) where stereochemistry is critical for biological activity. Also utilized in medicinal chemistry for structure-activity relationship (SAR) studies due to its defined stereoconfiguration and functional group compatibility.