Used as a key intermediate in the synthesis of pharmaceuticals and agrochemicals, particularly in the development of nicotinic acetylcholine receptor modulators. Its reactive ethynyl and bromo groups allow for selective cross-coupling reactions, making it valuable in constructing complex heterocyclic compounds for drug discovery. Commonly employed in palladium-catalyzed reactions such as Sonogashira coupling to build conjugated systems for bioactive molecules. Also utilized in the preparation of fluorescent probes and functional materials due to its ability to undergo click chemistry transformations.