反应详情

温度

50 °C

To a solution of crude 6-bromomethylquinoxaline (36.0 g) in 95% ethanol (200 mL) was added NaCN (30.9 g, 0.63 mol) at room temperature. The mixture was heated at 50° C. for 3 hours and then concentrated under vacuum. Water (100 mL) and ethyl acetate (100 mL) were added. The organic layer was separated and the aqueous layer was extracted with ethyl acetate. The combined organics were washed with brine, dried over Na2SO4 and concentrated under vacuum. The residue was purified by silica gel column (Petroleum Ether/EtOAc 10:1) to give 2-(quinoxalin-6-yl)acetonitrile (7.9 g, 23% over two steps). 1H NMR (300 MHz, CDCl3) δ 8.88-8.90 (m, 2H), 8.12-8.18 (m, 2H), 7.74 (dd, J=2.1, 8.7 Hz, 1H), 4.02 (s, 2H). MS (ESI) m/z (M+H)+ 170.0.

1. concentrationconcentrated under vacuum
2. additionWater (100 mL) and ethyl acetate (100 mL) were added
3. customThe organic layer was separated
4. extractionthe aqueous layer was extracted with ethyl acetate
5. washThe combined organics were washed with brine
6. dry with materialdried over Na2SO4
7. concentrationconcentrated under vacuum
8. customThe residue was purified by silica gel column (Petroleum Ether/EtOAc 10:1)