Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors and other bioactive molecules. Its sulfonyl fluoride group enables selective protein labeling and covalent inhibition, making it valuable in chemical biology and drug discovery. The bromine substituent allows further functionalization via cross-coupling reactions such as Suzuki or Heck reactions, facilitating the construction of complex heterocyclic compounds. Also employed in the preparation of proteolysis targeting chimeras (PROTACs) and other targeted degradation agents due to its ability to act as a linker or warhead component.