This compound is widely used in peptide synthesis as a protecting group for cysteine residues. The Boc group safeguards the amino group, while the S-benzyl group protects the thiol side chain of cysteine, preventing unwanted reactions during peptide assembly. It is particularly valuable in solid-phase peptide synthesis (SPPS) to ensure the correct sequence and structure of peptides. Additionally, it finds applications in the preparation of cysteine-containing peptides for research in biochemistry, pharmacology, and drug development, where precise control over peptide structure is essential. Its stability under various reaction conditions makes it a reliable choice for complex peptide synthesis.