Used as a protected form of aziridine in organic synthesis, particularly in the preparation of nitrogen-containing compounds such as amino acids, alkaloids, and pharmaceuticals. Its tert-butoxycarbonyl (Boc) group stabilizes the aziridine ring during reactions and can be removed under mild acidic conditions, allowing controlled ring-opening and functionalization. Commonly employed in medicinal chemistry for building constrained heterocyclic scaffolds that enhance metabolic stability and bioavailability in drug candidates. Also serves as a chiral building block in asymmetric synthesis due to the ring strain of aziridine, enabling regioselective and stereoselective transformations.