Used as a chiral building block in the synthesis of biologically active compounds, particularly in the development of pharmaceuticals. Its strained aziridine ring undergoes regioselective and stereospecific ring-opening reactions with various nucleophiles, enabling the introduction of functionalized amine moieties. Commonly employed in the preparation of protease inhibitors, amino acid derivatives, and other nitrogen-containing molecules with high enantiomeric purity. Also utilized in medicinal chemistry for constructing complex scaffolds where stereocontrol is critical.