Used as an intermediate in the synthesis of pharmaceutical compounds, particularly in the development of active pharmaceutical ingredients (APIs) where the azetidine ring serves as a structural scaffold. The tosylate group acts as a good leaving group, enabling nucleophilic substitution reactions to introduce various functional groups. The tert-butyloxycarbonyl (Boc) protecting group ensures selective reactivity by shielding the nitrogen during multi-step syntheses. Commonly applied in medicinal chemistry for constructing nitrogen-containing heterocycles with potential biological activity.