Benzoic acid, 3-methyl-2-nitro-, methyl ester → Methyl 2-nitro-3-(2-oxo-n-propyl)benzoate

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A solution of methyl 3-methyl-2-nitrobenzoate (1.5 g) and N,N-dimethylacetamide dimethyl acetal (3 ml) in dimethylacetamide (5 ml) was heated at 140° C. for 3 hours. After evaporation of the solvent, the resulting brown syrup was dissolved in ethyl acetate. The solution was washed with water, dried and concentrated to dryness. The residue was purified by column chromatography on silica gel to give a pale brown syrup (0.42 g, 23%).

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