Used as a key chiral intermediate in the synthesis of pharmaceutical agents, particularly in the development of protease inhibitors and antiviral drugs. Its protected amine and carboxylate functionalities allow for selective coupling reactions, making it valuable in peptide-based drug design. The stereochemistry at the 2 and 4 positions enables precise control over molecular conformation, enhancing biological activity and selectivity in final drug compounds. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its rigid pyrrolidine backbone and functional handles for derivatization.