Used as a chiral building block in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) where stereochemistry plays a critical role in biological activity. Its structure supports the creation of complex molecules with high enantioselectivity, making it valuable in the production of central nervous system agents, antiviral drugs, and other therapeutic compounds requiring specific three-dimensional orientation. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to the stability and bioavailability imparted by the fluorinated pyrrolidone core.