Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of protease inhibitors and other biologically active compounds. Its protected amine and carboxylic acid functionalities make it suitable for peptide coupling and solid-phase synthesis. The pyrrolidine ring with defined stereochemistry supports conformational control in drug design, enhancing selectivity and potency. Commonly employed in medicinal chemistry for structure-activity relationship studies and as an intermediate in the preparation of enzyme inhibitors targeting viral or metabolic diseases.