Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other bioactive molecules. Its spirocyclic structure and protected amine group make it valuable for constructing complex heterocyclic systems in medicinal chemistry. Commonly employed in solid-phase and solution-phase peptide-like synthesis due to the stability and selective deprotection of the Boc group. Also utilized in the preparation of drug candidates targeting neurological disorders and cancer, where the scaffold contributes to improved metabolic stability and binding selectivity.