Hydrochloric Acid → 1-(4-(1-(Methoxycarbonyl)cyclopropyl)benzyl)-2,3-dimethyl-1H-indole-5-carboxylic acid

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Reaction Steps

To a solution of 2,3-dimethyl-1H-indole-5-carboxylic acid (500 mg, 2.3 mmol) in anhydrous DMF (20 mL) was added methyl 1-(4-(bromomethyl)phenyl)cyclopropanecarboxylate (620 mg) followed by NaH (230 mg). The resulting solution was allowed to stir overnight under argon atmosphere. The remaining NaH was hydrolyzed by the careful addition of a 0.5 N HCl solution. The mixture was diluted with ethyl acetate, washed with a 0.5 N HCl solution and brine, dried on MgSO4, and concentrated. The crude residue was purified by chromatography on silica gel (Hexane/Ethyl acetate 5/5) to afford an orange powder (361 mg). ESI-MS (m/z): 378 [MH]+

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