Used as a protected intermediate in the synthesis of pharmaceutical compounds, featuring a tert-butyl carbamate (Boc) group that shields the amino functionality on the 2-azaspiro[3.5]nonane scaffold, preventing unwanted reactions during multi-step synthesis and allowing deprotection at a later stage. Particularly employed in the development of central nervous system agents, its spirocyclic structure supports the formation of bioactive molecules with potential applications in treating neurological disorders. Commonly used in medicinal chemistry for modifying drug candidates to enhance metabolic stability and blood-brain barrier penetration. Also utilized in research settings for creating novel spirocyclic derivatives with improved selectivity and potency.