Used as a chiral building block in the synthesis of complex peptides and peptidomimetics. Its protected amine groups allow for selective deprotection and coupling in solid-phase or solution-phase peptide synthesis. Commonly employed in the development of pharmaceutical intermediates, especially for protease inhibitors and other bioactive molecules requiring stereochemical control. The tert-butoxycarbonyl (Boc) groups provide stability under various reaction conditions, making it suitable for multi-step syntheses where orthogonal protection strategies are needed.