Used in pharmaceutical synthesis as a protected amine building block for drug development, particularly in the construction of complex nitrogen-containing heterocycles. Its Boc-protected amine group allows for selective reactivity in peptide coupling and ring-forming reactions. Commonly employed in the synthesis of protease inhibitors and receptor modulators due to the structural flexibility of the azepine core. Stable under a variety of reaction conditions, making it suitable for multi-step synthetic routes in medicinal chemistry.