Used in peptide synthesis as a protected amino acid building block, particularly in the preparation of complex peptides requiring selective deprotection and coupling steps. The Boc group provides temporary protection of the amino terminus, while the Mob group protects the thiol side chain, allowing stepwise assembly of peptides under mild conditions. Its methylated amide nitrogen helps reduce aggregation and improves solubility during solid-phase synthesis. Commonly applied in the production of pharmaceutical intermediates and bioactive peptides where precise stereochemistry and side-chain protection are critical.