反应详情

温度

70 °C

To a suspension of sodium hydride (5.4 g of 60% dispersion in mineral oil, 136 mmol, mineral oil was removed by washing twice with hexanes) in 100 mL of tetrahydrofuran at ambient temperature was added diethyl oxalate (12.3 mL, 91 mmol). To this mixture was added 2-acetylfuran (5.0 g, 45 mmol) as a solution in 25 mL of tetrahydrofuran. The resulting mixture was stirred at 70° C. for 1 h. The reaction was cooled to room temperature and then 10% HCl was added slowly until the solution was acidic. The tetrahydrofuran was removed in vacuo and the residue was taken up in ethyl acetate. The organics were washed with brine, dried (MgSO4) and concentrated to afford 5.5 g (58%) of the title compound which was used without purification.

1. customwas removed
2. washby washing twice with hexanes) in 100 mL of tetrahydrofuran at ambient temperature
3. temperatureThe reaction was cooled to room temperature
4. customThe tetrahydrofuran was removed in vacuo
5. washThe organics were washed with brine
6. dry with materialdried (MgSO4)
7. concentrationconcentrated