Used in pharmaceutical synthesis as a protected indole intermediate, particularly in the development of bioactive molecules and drug candidates. The BOC group stabilizes the nitrogen 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 and other central nervous system agents. Also utilized in agrochemical research for constructing complex heterocyclic systems. Its protected form enables selective reactions at other sites of the molecule, improving yield and purity in multi-step syntheses.