Used as a key intermediate in Suzuki-Miyaura cross-coupling reactions for the synthesis of biaryl compounds in pharmaceutical and agrochemical research. Its boronate ester group enables efficient carbon-carbon bond formation under mild conditions. Commonly applied in the development of conjugated organic materials, including those used in organic light-emitting diodes (OLEDs) and semiconductors. Also employed in medicinal chemistry for constructing complex heterocyclic systems due to the benzo[b]thiophene scaffold, which is present in some bioactive molecules.