Used as a key intermediate in the synthesis of complex peptide-based pharmaceuticals, particularly in the development of protease inhibitors. Its structure allows for sequential coupling in solid-phase peptide synthesis, enabling precise stereochemical control. Commonly employed in the production of antiviral drugs and other bioactive molecules requiring high enantiomeric purity. The tert-butoxycarbonyl (Boc) protecting group facilitates selective deprotection and chain elongation, making it valuable in multi-step syntheses of therapeutic peptides.