Hydrochloric Acid → 5-Chloro-2-methoxy-benzimidic acid ethyl ester

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Reaction Steps

Hydrogen chloride gas (˜200 mmol) was passed into a solution of 5-chloro-2-methoxy-benzonitrile(1.68 g, 10.0 mmol) in ethanol (50 ml). After stirring for 48 hours, the mixture was concentrated under reduced pressure. The residue was treated with ethyl acetate (25 ml) and stirred for 1 hour. Filtration provided 5-chloro-2-methoxy-benzimidic acid ethyl ester (1.20 g, 56% yield) as a white powder.

Provenance & Evidence