Used in the synthesis of antiviral agents, particularly as an intermediate in the preparation of nucleoside analogs. These analogs are structurally similar to natural nucleosides and can interfere with viral replication, making them valuable in drug development for viruses such as HIV and hepatitis. The presence of the thioxo group and acetoxy protecting groups allows for selective chemical modifications, enabling precise control during the synthesis of biologically active compounds. Its stereochemistry supports high specificity in enzymatic reactions, which is critical for efficacy and reduced side effects in therapeutic applications.