Methyl 4-dimethylaminovinyl-3-nitrobenzoate → Methyl 4-formyl-3-nitrobenzoate

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Reaction Steps

1.2 g (4.8 mmol) of methyl 4-(2-dimethylaminovinyl)-3-nitro-benzoate were dissolved in 120 ml of tetrahydrofuran/water (1:1) and after the addition of 3.0 g (14.3 mmol) of sodium metaperiodate the mixture was stirred for 20 hours at ambient temperature. The suspension was then diluted with water and methylene chloride and extracted with methylene chloride. The combined organic extracts were washed with sodium hydrogen carbonate solution, dried and evaporated down. The residue was chromatographed on silica gel and eluted with ethyl acetate/cyclohexane (1:3). Yield: 0.6 g (63% of theory), Rf value: 0.63 (silica gel, ethyl acetate/cyclohexane=1:1)

Provenance & Evidence