Z-Asp(OBzl)-OSu is widely used in peptide synthesis as a protecting group reagent. It is particularly effective in protecting the carboxyl group of aspartic acid during the formation of peptide bonds. This chemical ensures that the carboxyl group remains inactive, preventing unwanted side reactions while other functional groups are being modified. It is commonly employed in solid-phase peptide synthesis (SPPS) to facilitate the stepwise construction of peptides. Its stability and ease of removal under mild conditions make it a valuable tool in the production of complex peptides and proteins for research and pharmaceutical applications. Additionally, it is utilized in the synthesis of peptide-based drugs, where precise control over the assembly of amino acids is critical.