Used primarily in peptide synthesis as a protecting group for cysteine residues. The Boc (tert-butoxycarbonyl) group shields the amino group, while the trityl (triphenylmethyl) group protects the thiol functionality, preventing unwanted side reactions during peptide chain assembly. This compound is particularly valuable in solid-phase peptide synthesis, where selective deprotection allows for precise control over the sequence. It is also employed in the preparation of cysteine-containing peptides for biochemical and pharmaceutical research, ensuring the integrity of the thiol group, which is critical for disulfide bond formation and protein folding.