Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the preparation of peptide-based drugs. Its protected amino and amine functionalities allow selective coupling reactions, making it valuable in solid-phase peptide synthesis. Commonly employed in the development of protease inhibitors and other bioactive molecules where stereochemistry is critical. The Boc-protected amine ensures stability during reactions and can be easily deprotected under mild acidic conditions, enabling efficient stepwise assembly of complex peptides.