Used in pharmaceutical synthesis as a protected building block for drug development, particularly in creating compounds with central nervous system activity. The Boc-protected piperidine ring with an ethynyl group allows for efficient coupling reactions, such as click chemistry via Sonogashira or Huisgen cycloaddition, enabling rapid assembly of complex molecules. Commonly employed in the preparation of receptor ligands, kinase inhibitors, and bioactive molecules where structural diversity and stability are required. Its functionality supports solid-phase and solution-phase synthesis in medicinal chemistry workflows.