Used as a key chiral intermediate in the synthesis of active pharmaceutical ingredients, particularly in the production of anticoagulants and antiviral drugs. Its chiral center allows for stereoselective synthesis, improving the efficacy and safety of the final drug product. Commonly employed in multi-step organic transformations where a functionalized gamma-lactone moiety is required. Also utilized in the preparation of prodrugs due to its metabolic stability and ability to enhance bioavailability.