Used in organic synthesis as an intermediate for pharmaceuticals and fine chemicals, particularly in cross-coupling reactions such as Sonogashira coupling to form conjugated systems. Serves as a building block in the preparation of liquid crystals and organic semiconductors due to its rigid aromatic core and reactive ethynyl group. The ester functionality allows for further derivatization, enabling its use in polymer chemistry and the development of functional materials. Also explored in medicinal chemistry for designing bioactive molecules with aromatic and alkyne motifs.