Used in pharmaceutical synthesis as a protected indole intermediate, particularly in the development of bioactive molecules and drug candidates. The Boc group provides nitrogen protection during reactions, while the chloro substituent allows for further functionalization via cross-coupling reactions such as Suzuki or Buchwald-Hartwig aminations. Commonly employed in the preparation of serotonin receptor modulators, kinase inhibitors, and other heterocyclic compounds in medicinal chemistry research. Its stability and selective reactivity make it valuable in multi-step synthetic routes.