Used primarily in peptide synthesis, this compound enables selective protection and activation of aspartic acid residues. Its Boc-protected anhydride structure allows for efficient coupling with amino groups in amino acids or peptides under mild conditions, minimizing side reactions. Commonly employed in the preparation of complex peptides and modified proteins, it is especially valuable in solid-phase and solution-phase synthesis where controlled, stepwise assembly is required. Also utilized in the development of pharmaceutical intermediates and bioactive molecules requiring precise aspartate incorporation.