Used as a key intermediate in the synthesis of agrochemicals and pharmaceuticals, particularly in reactions where a reactive α,β-unsaturated ester system is needed. Its bromine functionality allows for cross-coupling reactions, making it valuable in building complex organic molecules. Commonly employed in Michael additions and palladium-catalyzed transformations to form carbon-carbon bonds. Also utilized in the preparation of heterocyclic compounds due to its ability to act as a dienophile in cycloaddition reactions.