Acetic Acid → Ethyl 4-acetamido-1-methyl-2-indolecarboxylate

Participants

Reaction Steps

In 20 ml of pyridine was dissolved 1.2 g (5.52 mmol) of ethyl 4-amino-1-methyl-2-indolecarboxylate. While stirring at room temperature, 10 ml of anhydrous acetic acid was added to the solution. After stirring for 2 hours at room temperature, the reaction mixture was poured onto ice water. The mixture was extracted three times with ethyl acetate. The combined extracts were washed with 1N hydrochloric acid and then with saturated sodium hydrogencarbonate solution. The solvent was then distilled off under reduced pressure and the residue was purified by silica gel column chromatography to give 1.40 g (97.9%) of ethyl 4-acetamido-1-methyl-2-indolecarboxylate.

Provenance & Evidence