Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of sulfonamide-based drugs and antimicrobial agents. Its structure supports the formation of biologically active heterocyclic compounds, making it valuable in medicinal chemistry for designing new therapeutic molecules. Also employed in research settings to develop novel isothiazole derivatives with potential antifungal, anti-inflammatory, or antiviral properties. Commonly utilized in combinatorial chemistry and drug discovery due to its reactive amino and ester functional groups, which allow for easy modification and derivatization.