Used as a building block in organic synthesis, particularly in the preparation of complex molecules through alkyne-based reactions. Its terminal alkyne group allows for participation in coupling reactions such as Sonogashira and Click chemistry, making it valuable in pharmaceutical and agrochemical research. Commonly employed to introduce ester and alkyne functionalities simultaneously, enabling further functionalization in multi-step syntheses. Also utilized in the development of specialty monomers and functional materials due to its reactive handles.