Used in pharmaceutical synthesis as a protected intermediate, particularly in the development of bioactive molecules requiring selective amine protection. Its spirocyclic structure and oxa-aza functionality support conformational rigidity, enhancing selectivity in drug design. Commonly employed in the preparation of kinase inhibitors and central nervous system agents due to its metabolic stability and favorable solubility profile. The tert-butyl carbamate group allows for mild deprotection, enabling efficient downstream functionalization in multi-step syntheses.