Used in the synthesis of antiviral agents, particularly in the development of hepatitis C virus (HCV) inhibitors. It serves as a key chiral intermediate in the preparation of NS5A inhibitors, which are critical components in direct-acting antiviral therapies. Its structural features enable strong binding to viral proteins, improving the potency and selectivity of the final drug compound. Widely utilized in pharmaceutical research for optimizing small-molecule therapeutics against HCV genotypes 1 and 4.