Used as a chiral building block in the synthesis of biologically active compounds, particularly in pharmaceutical development. Its activated leaving group (methylsulfonyloxy) enables efficient alkylation or ring-opening reactions, making it valuable for constructing complex nitrogen-containing molecules. Commonly employed in asymmetric synthesis to introduce the (S)-pyrrolidine scaffold, which is prevalent in drug candidates targeting central nervous system disorders, antiviral agents, and enzyme inhibitors. The tert-butyl carbamate (Boc) protection allows for selective deprotection under mild acidic conditions, enabling stepwise assembly in multi-step organic syntheses.