Widely used in Suzuki-Miyaura cross-coupling reactions, this compound serves as a key building block for constructing conjugated organic systems. Its boronic ester group enables efficient carbon-carbon bond formation under mild conditions, making it valuable in the synthesis of advanced materials such as organic semiconductors, liquid crystals, and molecular wires. The presence of the phenylethynyl group enhances π-conjugation, which is critical in developing optoelectronic materials for applications in OLEDs and organic photovoltaics. It is also employed in medicinal chemistry for assembling biaryl structures found in bioactive molecules and pharmaceuticals. The stability and reactivity profile of this reagent make it suitable for multi-step syntheses and library generation in drug discovery.