Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceutical research targeting kinase inhibitors. Its structure supports the development of antitumor and antiviral agents due to its ability to interact with specific enzyme active sites. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies, especially in optimizing thienopyrimidine-based drug candidates. Also utilized in agrochemical research for designing novel pesticides with improved efficacy and selectivity.