Used primarily as an intermediate in the synthesis of pharmaceutical peptides, this compound plays a key role in protecting the amine group during peptide coupling reactions. Its N-methyl and benzyloxycarbonyl (Cbz) protecting groups enhance stability and selectivity in multi-step syntheses, especially in the production of complex bioactive peptides. It is also employed in the development of enzyme inhibitors and receptor ligands where precise stereochemistry is required. Due to its D-configuration, it contributes to improved metabolic stability in therapeutic peptides, making it valuable in drug design for conditions such as cancer, viral infections, and neurological disorders.