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, particularly in the development of indole-based drug candidates. The tosyl group stabilizes the structure and can act as a protecting group, enabling selective reactions at other sites in the molecule. Commonly applied in the preparation of tryptamine and tryptophan analogs, as well as in the construction of complex heterocyclic systems found in natural products and medicinal agents.