Used in peptide synthesis as a protected amino acid derivative, enabling selective coupling and preventing unwanted side reactions. The Boc group protects the amine, while the methylated nitrogen and methionine side chain allow for the construction of modified peptides with enhanced metabolic stability. Commonly applied in the development of pharmaceuticals and bioactive peptides where controlled sequence assembly and resistance to enzymatic degradation are required. Also utilized in solid-phase synthesis and research involving enzyme substrates or inhibitors.