Used as a protected spirocyclic diamine building block in organic synthesis, particularly in pharmaceutical and agrochemical research. Its structure allows for selective functionalization, making it valuable in the development of complex molecules requiring rigid, spatially defined linkers. The tert-butyl carbamate (Boc) group enables reversible protection of one nitrogen, facilitating stepwise reactions in peptide-like couplings or heterocycle formation. Commonly employed in medicinal chemistry for designing protease inhibitors or receptor ligands where conformational restraint enhances biological activity and metabolic stability.