Used in peptide synthesis as a protected amino acid building block, particularly in the preparation of complex peptides where selective deprotection and coupling are required. The Boc group provides temporary N-terminal protection, while the Mob (4-methoxybenzyl) group protects the side chain functional group, allowing stepwise assembly under mild conditions. Commonly applied in the synthesis of bioactive peptides and pharmaceutical intermediates where orthogonal protection strategies are essential. Its stability under basic conditions and cleavability under acidic conditions makes it suitable for solid-phase and solution-phase peptide synthesis.