Used as a key chiral intermediate in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and antiviral agents. Its stereochemistry enables selective reactions in asymmetric synthesis, making it valuable in creating structurally complex drug molecules. Commonly employed in the preparation of active pharmaceutical ingredients (APIs) where precise 3D orientation is critical for biological activity. Also utilized in research settings for the design of enzyme inhibitors due to its rigid pyrrolidine backbone and functional groups that mimic natural substrates.