Used as a key chiral intermediate in the synthesis of antiviral drugs, particularly in the production of hepatitis C therapeutics. Its enantiomerically pure structure enables selective reactions in multi-step organic syntheses, improving yield and purity of the final active pharmaceutical ingredient. Commonly employed in medicinal chemistry for constructing cyclopentane-based nucleoside analogs that mimic natural ribose sugars, enhancing metabolic stability and target binding. Also utilized in the development of protease inhibitors due to its rigid cyclic framework and functional group compatibility.