Used in organic synthesis as an intermediate for pharmaceuticals and fine chemicals. Its ethynyl group allows participation in coupling reactions, such as Sonogashira or click chemistry, making it valuable in drug discovery and development of bioactive molecules. The ester functionality can be hydrolyzed or transformed to introduce carboxylic acid derivatives, enabling further structural modifications. Commonly employed in the preparation of conjugated systems for materials science and in the synthesis of analogs for structure-activity relationship studies.