Used as a key intermediate in the synthesis of pharmaceuticals and biologically active compounds, particularly in the development of indole-based drugs. Its structure allows for selective functionalization, making it valuable in medicinal chemistry for creating analogs with potential anti-inflammatory, anticancer, or antimicrobial properties. Also employed in the preparation of fluorescent probes and dyes due to the indole core’s inherent optical characteristics. Commonly utilized in research settings for constructing complex heterocyclic systems in organic synthesis.