Table 3. H–D Exchange Reaction of 3-Unsubstituted Indoles^a.

^aReactions were performed in CD₃CO₂D (0.1 M) in a sealed tube at 150 °C for 110 h.

^bD content was calculated based on the ¹H NMR spectra of the isolated product.

^cIsolated yield.

^dD content was calculated based on ¹H NMR spectroscopy after N-methylation.

^eIndicated as average D incorporation.