Used as a key intermediate in Suzuki-Miyaura cross-coupling reactions, enabling the synthesis of complex indole derivatives in pharmaceuticals and organic materials. Its boronate ester groups facilitate efficient carbon-carbon bond formation under mild conditions. Commonly applied in the development of bioactive molecules, functional dyes, and conjugated polymers for optoelectronic devices. High stability and reactivity make it valuable in medicinal chemistry for constructing drug-like scaffolds.