Widely used in Suzuki-Miyaura cross-coupling reactions, this compound serves as a key boronic ester reagent for forming carbon-carbon bonds in organic synthesis. Its robust stability and high reactivity make it ideal for constructing biaryl frameworks commonly found in pharmaceuticals, agrochemicals, and advanced materials. The presence of the ethynyl linker enhances electronic communication in conjugated systems, making it valuable in the development of organic electronic materials such as OLEDs and semiconductors. It is also employed in late-stage functionalization during drug discovery, allowing efficient introduction of aromatic substituents under mild palladium-catalyzed conditions.