Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of central nervous system (CNS) agents. Its spirocyclic structure and protected amine functionality make it valuable in medicinal chemistry for constructing constrained analogs that improve metabolic stability and receptor selectivity. Commonly employed in the preparation of bioactive molecules where stereochemistry and ring conformation influence potency. The tert-butyloxycarbonyl (Boc) protection allows for selective deprotection and further derivatization in multi-step synthesis.