Used as a key intermediate in Suzuki-Miyaura cross-coupling reactions, enabling the formation of carbon-carbon bonds in the synthesis of complex indole derivatives. Its boronate ester group facilitates coupling with aryl or heteroaryl halides under palladium catalysis, making it valuable in pharmaceutical and agrochemical research for constructing biologically active molecules. The phenylsulfonyl group enhances stability and can act as a directing or protecting group during transformations. Commonly employed in medicinal chemistry for developing kinase inhibitors and other therapeutic agents.