Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of peptidomimetics and active pharmaceutical ingredients (APIs) where stereochemistry plays a critical role. Its protected amine and carboxylic acid functionalities make it ideal for solid-phase and solution-phase peptide synthesis. Commonly employed in the preparation of enzyme inhibitors and receptor modulators due to its structural stability and defined stereoconfiguration. The tert-butoxycarbonyl (Boc) group allows for mild deprotection conditions, enabling selective and efficient multi-step synthetic routes in drug discovery and development.