Used in pharmaceutical synthesis as a protected building block for drug development, particularly in the preparation of bioactive molecules targeting central nervous system disorders. The Boc-protected piperidine ring provides structural stability and selectivity during coupling reactions, while the ethynyl group allows further functionalization via click chemistry or cross-coupling reactions. Commonly employed in the synthesis of kinase inhibitors, receptor agonists, and protease inhibitors. Its versatility makes it valuable in combinatorial chemistry and medicinal chemistry research for generating novel compound libraries.