Used as a protected heterocyclic amine building block in organic synthesis, particularly in pharmaceutical development. Its spirocyclic structure and masked amine functionality make it valuable for constructing complex nitrogen-containing molecules. The tert-butyl carbamate (Boc) group allows for selective deprotection under mild acidic conditions, enabling stepwise assembly of multi-step synthetic routes. Commonly employed in the preparation of bioactive compounds, including drug candidates targeting central nervous system disorders and enzyme inhibitors. Its oxygen and nitrogen atoms provide polarity and hydrogen bonding capability, useful in improving solubility and target binding in medicinal chemistry applications.