Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals. It serves in the development of antiviral and antibacterial agents due to its reactive sulfonyl chloride group, which readily forms sulfonamides—structures commonly found in drug molecules. Its chloro and heterocyclic framework also supports derivatization for use in agrochemicals and kinase inhibitors. Commonly employed in medicinal chemistry for scaffold modification to enhance potency and metabolic stability.