Used primarily as an intermediate in organic synthesis, especially in the preparation of heterocyclic compounds. It plays a key role in the formation of indoles and related structures through cyclization reactions. Commonly employed in pharmaceutical manufacturing for building nitrogen-containing ring systems found in bioactive molecules. Also utilized in the synthesis of dyes and fluorescent agents due to its reactivity with amines and aromatic systems. Its bromo functionality allows for further functionalization via cross-coupling reactions, making it valuable in medicinal chemistry research.