Used in peptide synthesis as a protected amino acid derivative, enabling selective coupling and preventing side reactions. The Boc group provides temporary N-terminal protection, while the Z group shields the side chain amine of the diaminopropionic acid moiety. This dual protection is valuable in solid-phase and solution-phase synthesis of complex peptides, especially in pharmaceutical research where stereochemical control is critical. The D-configuration helps introduce structural constraints or enhance metabolic stability in designed bioactive peptides. Commonly applied in the development of peptide-based drugs, enzyme inhibitors, and diagnostic agents.