Used as a key intermediate in the synthesis of protease inhibitors, particularly in the development of antiviral drugs targeting hepatitis C virus (HCV). Its structure supports high binding affinity to enzyme active sites, enhancing inhibitory activity. Commonly employed in medicinal chemistry for optimizing pharmacokinetic properties such as metabolic stability and oral bioavailability. Also utilized in structure-activity relationship (SAR) studies to improve potency and selectivity of drug candidates.