Used as a key intermediate in the synthesis of pharmaceutical peptides, particularly in the production of protease inhibitors such as those used in antiviral medications. Its primary role is to protect specific functional groups during peptide coupling reactions, allowing selective bond formation in complex molecules. Commonly employed in solid-phase peptide synthesis due to its compatibility with Fmoc and Boc strategies. Also utilized in the development of enzyme inhibitors where stereochemical control is critical for biological activity.