Used as a key intermediate in organic synthesis, particularly in the preparation of bioactive molecules and pharmaceuticals. Its alkyne and ester functional groups allow for versatile reactivity, including click chemistry via copper-catalyzed azide-alkyne cycloaddition (CuAAC), making it valuable in drug discovery and development. Commonly employed in the construction of complex heterocyclic systems due to its ability to undergo cyclization and coupling reactions. Also utilized in materials science for designing functionalized polymers and conjugated systems.