Used as a key intermediate in Suzuki-Miyaura cross-coupling reactions, enabling the formation of carbon-carbon bonds in the synthesis of complex organic molecules, particularly in pharmaceuticals and agrochemicals. Its boronate ester group facilitates efficient coupling with aryl or heteroaryl halides under palladium catalysis, making it valuable in drug discovery and materials science. The phenylsulfonyl group enhances stability and can act as a directing or protecting group during synthesis. Commonly employed in the preparation of biologically active indole derivatives.