Used primarily as a key intermediate in pharmaceutical synthesis, especially in the preparation of bioactive indole derivatives. Its boronate ester functionality enables efficient cross-coupling reactions, such as Suzuki-Miyaura coupling, allowing the formation of carbon-carbon bonds in complex molecule assembly. Commonly applied in the development of drug candidates targeting inflammation, cancer, and central nervous system disorders. Its protected carboxyl and indole groups facilitate selective reactions, making it valuable in multi-step synthetic routes for high-purity active pharmaceutical ingredients.