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 allow for selective modifications, making it valuable in medicinal chemistry for constructing complex heterocyclic systems. Commonly employed in the preparation of protease inhibitors and receptor modulators due to its conformational rigidity and compatibility with peptide-like frameworks. Also utilized in research settings for building blocks in drug discovery programs.