Used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions, to construct biaryl compounds which are common scaffolds in pharmaceuticals and agrochemicals. Its boronic acid group enables efficient carbon-carbon bond formation under mild conditions. Commonly employed in the development of liquid crystals, organic electronic materials, and conjugated polymers due to the rigid, linear structure provided by the ethynyl linker. Also utilized as a building block in medicinal chemistry for creating analogs with enhanced biological activity. Stable and compatible with a wide range of functional groups, making it valuable in multi-step synthesis and library generation for drug discovery.