Phenethylboronic acid is widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is essential for forming carbon-carbon bonds, making it valuable in the production of pharmaceuticals, agrochemicals, and advanced materials. Its boronic acid group acts as a key intermediate, enabling the creation of complex organic molecules with high precision. Additionally, it is employed in the development of bioactive compounds and as a building block in medicinal chemistry for drug discovery. Its stability and reactivity make it a versatile reagent in various catalytic processes.