Used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions, to create complex biaryl compounds. It serves as a key intermediate in the production of pharmaceuticals, agrochemicals, and advanced materials. The ethynyl group allows for further functionalization, enabling the development of polymers, sensors, and molecular electronics. Its boronic ester moiety enhances stability and reactivity, making it valuable in medicinal chemistry for drug discovery and development.