反応 #75554

反応方程式

(4-chlorophenyl)acetonitrile

2-bromoethyl ether

dimethylsulfoxide

sodium hydride

→

4-(4-chlorophenyl)tetrahydropyran-4-carbonitrile

収率 95.5%

溶媒

diethyl ether

反応条件

後処理

1. 1
   その他Into a round-bottom flask under argon fitted with an addition funnel
2. 2
   温度The reaction mixture was maintained at room temperature for overnight
3. 3
   その他The reaction mixture was carefully quenched with water (50 mL)
4. 4
   抽出extracted with hexane (3×100 mL)
5. 5
   洗浄washed with water (3×75 mL), brine (50 mL)
6. 6
   乾燥dried over anhydrous magnesium sulfate
7. 7
   ろ過filtered
8. 8
   濃縮concentrated
9. 9
   その他to give a pale yellow oil
10. 10
    その他The oil was purified by column chromatography on silica gel

実験手順

Into a round-bottom flask under argon fitted with an addition funnel and thermometer was added anhydrous dimethylsulfoxide (60 mL) and sodium hydride (1.17 g, 48.8 mmol, 95%). Then a solution of (4-chlorophenyl)acetonitrile (G) (3.37 g, 22.2 mmol) and 2-bromoethyl ether (90%, 3.41 mL, 24.4 mmol) in diethyl ether (15 mL) was added slowly, while maintaining the reaction temperature at 20-30° C. The reaction mixture was maintained at room temperature for overnight. The reaction mixture was carefully quenched with water (50 mL) and then extracted with hexane (3×100 mL). The organic extracts were combined, washed with water (3×75 mL), brine (50 mL), dried over anhydrous magnesium sulfate, filtered, and concentrated to give a pale yellow oil. The oil was purified by column chromatography on silica gel using hexane/ethyl acetate (80:20) to give 4.7 g of 4-(4-chlorophenyl)tetrahydropyran-4-carbonitrile, H, as a colorless oil. 1H NMR (CDCl3, 300 MHz): δ 2.00-2.15 (m, 4H); 3.89 (dt, 2H, J1=12.6 Hz, J2=3 Hz); 4.05-4.11 (m, 2H); 7.37-7.45 (m, 4H); 13C NMR (CDCl3, 75 MHz): δ 36.66 (2C), 41.51, 64.98 (2C), 121.40,127.03, 129.37, 134.31, 138.46.

出典