Trifluoroacetic acid → 7-(aminocarbonyl)-1H-indole-4-carboxylic acid

Participants

Reaction Steps

4: To a solution of tert-butyl 7-carbamoyl-1H-indole-4-carboxylate (0.15 g, 0.58 mmol) in dichloromethane (10 mL) was added trifluoroacetic acid (10 mL), and the mixture was heated to reflux until the starting material was fully consumed. The solvent was evaporated followed by rotary evaporation of the residue from a mixture of ethyl acetate (50 mL) and toluene (50 mL). The procedure was repeated three times and the residue dried in vacuo to obtain 7-(aminocarbonyl)-1H-indole-4-carboxylic acid (0.16 g, 89%). MS (EI) for C10H8N2O3: 205 (MH+).

Provenance & Evidence