Ethyl Acetate → 2-Chloro-4-ethoxypyridine
反応式
[Cl:1][C:2]1[CH:7]=[C:6]([N+]([O-])=O)[CH:5]=[CH:4][N:3]=1.[CH2:11]([O-:13])[CH3:12].[Na+].CC(=O)OCC>C1COCC1>[Cl:1][C:2]1[CH:7]=[C:6]([O:13][CH2:11][CH3:12])[CH:5]=[CH:4][N:3]=1参加物
5
反応条件
- 温度
- 25 °C
[Cl:1][C:2]1[CH:7]=[C:6]([N+]([O-])=O)[CH:5]=[CH:4][N:3]=1.[CH2:11]([O-:13])[CH3:12].[Na+].CC(=O)OCC>C1COCC1>[Cl:1][C:2]1[CH:7]=[C:6]([O:13][CH2:11][CH3:12])[CH:5]=[CH:4][N:3]=1To a mixture of 2-chloro-4-nitropyridine (170 g, 1070 mmol) in THF (2 L) was added sodium ethanolate (109.45 g, 1610 mmol) slowly at 0° C. The mixture was stirred at 25° C. for 12 h. LCMS and TLC (PE/EA=5:1, Rf=0.6) showed the reaction was finished. The mixture was filtered, and most solvent of the filtrate was removed in vacuo. The residue was extracted with EA (800 mL×3), and the organic layer was washed with saturated NaCl solution (1 L), dried over Na2SO4, filtered, and concentrated to give crude 2-chloro-4-ethoxypyridine (157 g, 1.0 mol, 92% yield) as a solid: 1H NMR (400 MHz, CD3OD) δ 8.15 (d, J=6.0 Hz, 1H), 6.99 (d, J=2.0 Hz, 1H), 6.91-6.89 (m, 1H), 4.16-4.14 (m, 2H), 1.41-1.38 (m, 3H); ES-LCMS m/z 158 (M+H).
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