Dimethylformamide → 1-(2,2-Dimethoxyethyl)-3-methyl-2-nitrobenzene

関与物質

反応手順

Combine 2-nitro-meta-xylene (5 mL, 0.037 mol), N,N-dimethylformamide dimethylacetal (5.4 mL, 1.1 eq) and N,N-dimethylformamide (60 mL) in a flask and reflux under nitrogen for 2 days. Let cool to room temperature then concentrate to approximately one-half volume. Add methanol (40 mL) and trimethylsilylchloride (6.6 mL, 1.4 eq). Reflux overnight. Dilute with ethyl acetate after cooling to room temperature then extract with saturated sodium bicarbonate followed by brine. Dry over magnesium sulfate, filter and concentrate. Purification by column chromatography (9:1 Hexanes:ethyl acetate) gives 1.15 g (14%) product as a light yellow oil. 1H NMR (400 MHz, DMSO-d6) δ 2.23 (s, 3H), 2.80 (d, J=5.36 Hz, 2H), 3.19 (s, 6H), 4.45 (m, 1H), 7.32 (m, 2H), 7.42 (m, 1H).

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