Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and other bioactive molecules. Its spirocyclic structure provides structural rigidity and stereochemical control, making it valuable in drug design for enhancing selectivity and metabolic stability. Commonly employed in medicinal chemistry for constructing complex heterocyclic systems found in potential treatments for cancer, inflammatory diseases, and neurological disorders. The tert-butoxycarbonyl (Boc) protecting group allows for selective amine functionalization during multi-step syntheses, enabling efficient coupling reactions in peptide-like frameworks.