Used as an intermediate in peptide synthesis, particularly in the preparation of pharmaceutical compounds where protection of the amine group is required. Its tert-butoxycarbonyl (Boc) protecting group allows for selective reaction at other functional sites during multi-step syntheses. Commonly employed in the development of protease inhibitors and other bioactive molecules due to its stability under various reaction conditions and ease of deprotection. Also utilized in research settings for labeling and modifying peptides to study biological activity.