Used primarily as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide and sulfonate ester derivatives. It plays a significant role in the development of kinase inhibitors and other targeted therapies in medicinal chemistry. The bromo and dihydrobenzofuran moieties allow for further functionalization via cross-coupling reactions, enhancing its utility in drug discovery and design.