This chemical is primarily used in peptide synthesis as a protected form of cysteine. The Boc (tert-butyloxycarbonyl) group serves as a protective group for the amino function, while the methyl group on the thiol side chain provides additional stability during the synthesis process. It is particularly useful in solid-phase peptide synthesis (SPPS) to prevent unwanted side reactions and ensure the correct formation of peptide bonds. The compound is also employed in the preparation of cysteine-containing peptides for research in biochemistry and pharmaceuticals, where precise control over the peptide structure is essential. Its application extends to the development of peptide-based drugs, where protecting groups are crucial for maintaining the integrity of the peptide chain during synthesis.