Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of central nervous system (CNS) agents. Its spirocyclic structure and embedded nitrogen make it valuable in medicinal chemistry for constructing bioactive molecules with improved metabolic stability and binding affinity. Commonly employed in the preparation of selective enzyme inhibitors and receptor modulators, especially in research targeting neurological disorders. The tert-butyl ester group allows for easy protection during multi-step syntheses, enabling selective deprotection and further functionalization in drug design.