Used in organic synthesis as a key intermediate for pharmaceuticals and bioactive compounds. Serves as a building block in the preparation of indole-based drugs, particularly in the development of kinase inhibitors and antitumor agents. Its aldehyde and bromo functional groups allow for diverse transformations, including cross-coupling reactions and condensation, making it valuable in medicinal chemistry and drug discovery. Also employed in the synthesis of fluorescent dyes and optoelectronic materials due to the indole scaffold’s favorable electronic properties.