Used as a key reagent in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. It serves as a boronic ester precursor, enabling the formation of carbon-carbon bonds between aromatic or alkenyl groups. Its stability and reactivity make it valuable for constructing complex organic molecules in pharmaceuticals, agrochemicals, and functional materials. The 3-phenylpropyl group allows for the introduction of extended aromatic side chains, useful in designing bioactive compounds and conjugated systems.