Used primarily as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of protease inhibitors and other biologically active molecules. Its structure allows for selective modification in peptide-based drug design, making it valuable in medicinal chemistry. The tert-butoxycarbonyl (Boc) protecting group facilitates controlled reactions by preventing unwanted side reactions at the amine site during multi-step syntheses. Commonly employed in solid-phase and solution-phase peptide coupling, it helps build complex molecules with high purity and yield.