Used as a chiral auxiliary in asymmetric synthesis, particularly in the preparation of optically active compounds such as amino acids and nitrogen-containing heterocycles. Its rigid aziridine ring and ester groups allow for selective ring-opening reactions with nucleophiles, enabling the controlled formation of stereocenters. Commonly employed in pharmaceutical intermediates where stereochemistry is critical, such as in the synthesis of protease inhibitors or bioactive molecules. The benzyl and methyl ester groups can be selectively removed or modified, offering versatility in synthetic pathways.