Used as a key intermediate in Suzuki-Miyaura cross-coupling reactions for the synthesis of biologically active indole derivatives. Its boronic acid functionality allows for efficient carbon-carbon bond formation, making it valuable in pharmaceutical research and development of drug candidates targeting inflammation, cancer, and neurological disorders. The phenylsulfonyl group enhances stability and influences electronic properties, improving reaction selectivity and yield in heterocyclic compound synthesis. Commonly employed in medicinal chemistry for constructing complex indole-based scaffolds found in bioactive molecules.