Used primarily in peptide synthesis as a protective group for aspartic acid, ensuring selective reactions during the formation of peptide bonds. It helps prevent unwanted side reactions by temporarily blocking reactive sites, allowing for precise control over the assembly of complex peptide structures. Commonly employed in the pharmaceutical industry for the development of peptide-based drugs, where maintaining the integrity of specific amino acids is crucial. Also utilized in research laboratories for studying peptide behavior and interactions, aiding in the design of novel therapeutic agents.