5-Methylfurfural → HCID 86637695、化合物

関与物質

反応手順

To a suspension of triphenyl-(3-ethoxycarbonylpropyl)phosphonium bromide (2.27 g, 5 mmol) and 5-methylfurfural (0.55 g, 5 mmol) in 5 mL of dry tetrahydrofuran, a 1 M solution of sodium bis(trimethylsilyl)amide in tetrahydrofuran (5 mL) was added dropwise. The reaction mixture was stirred at room temperature for 2 hours and quenched with 2 N hydrochloric acid solution. The reaction mixture was extracted with ethyl acetate and the combined organic layers were dried over magnesium sulfate, concentrated and chromatographed eluting with 5% ethyl acetate/hexane to yield the title product: 1H NMR (300 MHz, CDCl3) δ 6.16 (d, J=3.05 Hz, 1H), 5.97 (dd, J=3.22, 0.85 Hz, 1H), 5.42 (dt, J=11.44, 7.11 Hz, 1H)), 4.14 (q, J=7.2 Hz, 2H), 2.76 (m, 2H), 2.47 (t, J=7.46 Hz, 2H), 2.31 (s, 3H), 1.25 (t, J=7.12 Hz, 3H); MS (DCI/NH3)(M+H)+ m/z 209.

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