Dimethylformamide → 5-bromo-6-methyl-1H-indole-3-carbaldehyde

Participants

Reaction Conditions

Reaction Steps

Phosphorus oxychloride (0.73 g, 4.79 mmol) and DMF (5.0 mL) were mixed together and stirred for 5 min. A solution of 5-bromo-6-methyl-1H-indole (500 mg, 2.39 mmol) in DMF (3.0 mL) was added to the solution slowly and complete solid was formed which stopped stirring. The solution was adjusted to pH=10 with 1 N NaOH, then heated to 100° C. for 1 min. The reaction was cooled to room temperature. The precipitated solids were filtered and dried to give the title compound (480 mg, 85%) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ 12.2 (s, 1 H), 9.88 (s, 1 H), 8.28 (s, 1 H), 8.23 (s, 1 H), 7.49 (s, 1 H), 2.44 (s, 3 H).

Provenance & Evidence