Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of alkaloid-based drugs. Its protected amine group allows selective reactions at other functional sites, making it valuable in multi-step organic syntheses. Commonly employed in the preparation of protease inhibitors, receptor antagonists, and central nervous system agents. The Boc-protected tetrahydroisoquinoline scaffold is also utilized in medicinal chemistry for building complex heterocyclic structures with biological activity.