Hydrochloric Acid → N-(1-Methyl-1H-indole-2-carbonyl)glycine

Participants

Reaction Steps

(1-Methylindole-2-carbonyl)glycine methyl ester (1.687 g, 6.85 mmol) was dissolved in 1,4-dioxane (10 mL) and was treated with 1 N lithium hydroxide (7.0 mL, aq) with stirring. The reaction mixture turned clear immediately and was acidified with 1 N HCl and concentrated to remove 1,4-dioxane to result in a purple precipitate. The precipitate was filtered, washed with water, and dried in vacuo to give the title product as a purple powder (1.482 g, 93%). TLC: (methylene chloride:methanol:acetic acid, 20:1:1, silica gel): Rf=0.28; 1H NMR (CD3OD): δ7.61 (dt, J=8.2, 1H). 7.44 (dd, J=8.5, 0.8, 1H), 7.32-7.26 (m, 1H), 7.13-7.09 (m. 1H), 7.04 (s, 1H), 4.08 (s, 2H), 3.99 (s, 3H).

Provenance & Evidence