Used primarily in peptide synthesis, this compound serves as a protected form of cysteine. The Boc (tert-butyloxycarbonyl) group safeguards the amino group, while the trityl (trt) group protects the thiol side chain of cysteine. This dual protection is crucial during the stepwise assembly of peptides, preventing unwanted side reactions. It is particularly valuable in synthesizing peptides containing cysteine residues, which are prone to oxidation and disulfide bond formation. The compound ensures precise and controlled incorporation of cysteine into peptide chains, making it essential in the production of therapeutic peptides, proteins, and research applications involving cysteine-rich sequences.