Hydrochloric Acid → 6-cyano-1-methyl-1H-indole-2-carboxylic acid

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Reaction Steps

To a solution of 6-Cyano-1-methyl-1H-indole-2-carboxylic acid ethyl ester (51 mg, 0.22 mmol) in 1,4-dioxane/water (5:1, 6 mL) add LiOH monohydrate (13 mg, 0.31 mmol). Stir the reaction mixture at rt overnight. Remove the solvent in vacuo and dissolve the residue in water (2 mL) to form a solution. Acidify with 1 M HCl solution to form a white suspension. Collect the solid by filtration and dry to give the desired product 6-cyano-1-methyl-1H-indole-2-carboxylic acid as a solid (44 mg, 0.22 mmol).

Provenance & Evidence