Used in the synthesis of pharmaceutical intermediates, particularly in the development of kinase inhibitors for cancer treatment. Serves as a building block in organic synthesis due to the reactivity of the ethynyl group, enabling coupling reactions such as Sonogashira cross-coupling. Employed in the preparation of functionalized pyridine derivatives for use in agrochemicals and materials science. Its ester group allows for further derivatization, making it valuable in medicinal chemistry for structure-activity relationship studies.