Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of bioactive molecules targeting central nervous system disorders. Its spirocyclic structure and functional groups make it valuable for constructing complex heterocyclic scaffolds in medicinal chemistry. Commonly employed in peptide mimetic design and protease inhibitor research due to its conformational rigidity and ability to mimic amino acid geometry. Also utilized in the preparation of enzyme inhibitors where selective binding is required.