Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules targeting neurological disorders and cancer. Its spirocyclic structure and functional groups enable selective interactions with enzymes and receptors, making it valuable in medicinal chemistry for building complex heterocyclic systems. Commonly employed in solid-phase and solution-phase peptide-like synthesis due to the presence of the tert-butyloxycarbonyl (Boc) protecting group, which allows for controlled deprotection and coupling steps. Also utilized in the preparation of compound libraries for high-throughput screening in drug discovery.