Used in the synthesis of pharmaceuticals, particularly as a chiral building block in the production of active pharmaceutical ingredients (APIs). Its structural features make it valuable in asymmetric synthesis, where it helps control stereochemistry in complex molecules. Commonly employed in the development of protease inhibitors and other biologically active compounds. Also utilized as a ligand or auxiliary in catalytic reactions to achieve high enantioselectivity. Its presence in drug design enhances metabolic stability and binding affinity in medicinal chemistry applications.