Used as a key intermediate in the synthesis of pharmaceutical agents, particularly in the development of kinase inhibitors and neuroactive compounds. Its spirocyclic structure and protected amine group make it valuable for constructing complex heterocycles in drug discovery. Commonly employed in medicinal chemistry for modifying peptide-like backbones to enhance metabolic stability and bioavailability. Also utilized in the preparation of selective ligands for central nervous system targets due to its rigid framework and hydrogen-bonding capability.