Used as an intermediate in pharmaceutical synthesis, particularly in the development of bioactive molecules targeting central nervous system disorders. Its spirocyclic structure with fluorinated substituents enhances metabolic stability and blood-brain barrier penetration, making it valuable in medicinal chemistry. The tert-butoxycarbonyl (Boc) protecting group allows for selective amine functionalization during multi-step synthesis. Commonly employed in the preparation of kinase inhibitors and GPCR modulators due to its favorable conformational rigidity and polarity profile.