Used as a key intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. Its conjugated ynoate functionality, featuring an electron-deficient internal alkyne, enables participation in various cycloaddition reactions, such as Diels-Alder cycloadditions with dienes, facilitating the efficient construction of complex cyclic molecules. Frequently employed in the synthesis of conjugated systems for materials science applications, including organic semiconductors and fluorescent probes. Also serves as a building block in the development of bioactive compounds, especially in medicinal chemistry research targeting enzyme inhibitors and receptor modulators.