反应详情

温度

60 °C

To a solution of (8-fluoro-2,3-dihydro-1,4-benzodioxin-6-yl)acetonitrile (0.40 g, 2.10 mmol) in THF (10 mL) was added sodium hydride (60% dispersion in mineral oil, 0.25 g, 6.3 mmol) and ethyl acetate (2.05 ml, 21.0 mmol) and the mixture was stirred at 60° C. for 2 h. After cooling to 0° C., water was added (25 mL) and the aqueous layer was washed with dichloromethane (3×15 mL), acidified with 1N HCl to pH 3 and extracted with ethyl acetate (3×25 mL). The combined organic extracts were washed with brine (30 mL) then dried with sodium sulfate, filtered and concentrated to give 2-(8-fluoro-2,3-dihydro-1,4-benzodioxin-6-yl)-3-oxobutanenitrile as an orange solid (0.37 g; 75% yield). 1H NMR (400 MHz, d6-DMSO) δ 7.05 (dd, 1H), 6.93 (br. s, 1H), 4.30 (m, 5H), 2.30 (s, 3H).

1. temperatureAfter cooling to 0° C.
2. washthe aqueous layer was washed with dichloromethane (3×15 mL)
3. extractionextracted with ethyl acetate (3×25 mL)
4. washThe combined organic extracts were washed with brine (30 mL)
5. dry with materialthen dried with sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated