Used in peptide synthesis as a protected building block, enabling selective amine group coupling while preventing unwanted side reactions. The Boc (tert-butoxycarbonyl) group provides temporary protection of the primary amine, allowing stepwise assembly of complex peptides. Commonly employed in solid-phase and solution-phase synthesis for pharmaceutical research and development of bioactive molecules. Stable under a range of reaction conditions, it facilitates high yields and purity in final products.