This compound is widely used in peptide synthesis as a protecting group for aspartic acid. It helps in preventing unwanted reactions at the aspartic acid site during the formation of peptide bonds, ensuring the synthesis proceeds smoothly. The BOC (tert-butyloxycarbonyl) group provides stability under various reaction conditions, while the OSU (N-hydroxysuccinimide ester) facilitates efficient coupling with other amino acids. The OBZL (benzyl ester) group offers additional protection for the carboxyl group of aspartic acid. This makes it a valuable reagent in the production of complex peptides, particularly in pharmaceutical research and development, where precise and controlled synthesis is critical.