5-Bromoindole is a chemical intermediate that can be used for the synthesis of GSK-3 inhibitors and anti-cancer agents[1][2].
[1]. Gunosewoyo H, et al. Characterization of maleimide-based glycogen synthase kinase-3 (GSK-3) inhibitors as stimulators of steroidogenesis. J Med Chem. 2013 Jun 27;56(12):5115-29.
[2]. Butler-FernÁndez KM, et al. Synthesis, Anti-Cancer and Anti-Migratory Evaluation of 3,6-Dibromocarbazole and 5-Bromoindole Derivatives. Molecules. 2019 Jul 24;24(15):2686.