Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of bioactive molecules and drug candidates. Its spirocyclic structure and functional groups make it valuable for constructing complex heterocyclic systems found in medicinal chemistry. The Boc-protected amine and carboxylic acid allow for selective derivatization, enabling peptide coupling and ring modifications. Commonly employed in the preparation of protease inhibitors and central nervous system agents due to its conformational rigidity and favorable solubility properties.