Used in peptide synthesis as a protecting group for methionine to prevent unwanted side reactions during the formation of peptide bonds. It is particularly valuable in solid-phase peptide synthesis (SPPS) where selective deprotection is required. The Boc group can be removed under acidic conditions, allowing for controlled and sequential assembly of peptides. This compound is also employed in the preparation of modified peptides and in the study of peptide structure and function, especially when oxidation-sensitive methionine residues are involved. Its application extends to the development of pharmaceutical peptides and bioactive compounds.