Used as a key intermediate in the synthesis of pharmaceuticals and agrochemicals, particularly in the development of kinase inhibitors and other biologically active compounds. Its ethynyl and bromo functional groups allow for selective cross-coupling reactions, such as Sonogashira and Suzuki couplings, making it valuable in medicinal chemistry for building complex heterocyclic systems. Also employed in materials science for constructing conjugated organic frameworks and in the preparation of fluorescent probes due to its ability to participate in click chemistry transformations.