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 protected amine functionality make it valuable in medicinal chemistry for constructing complex heterocyclic systems. Commonly employed in the preparation of kinase inhibitors and central nervous system agents due to its favorable steric and electronic properties. Also utilized in solid-phase and solution-phase peptide-like synthesis where selective deprotection and coupling are required.