反应详情

温度

0 °C

Solid KHMDS (4.36 g, 22.0 mmol) is dissolved in THF (80.0 mL) and cooled to 0° C. Cyclohexanecarbonitrile (2.38 g, 22.0 mmol) is added, and the resulting solution is stirred for 40 minutes. A solution of 4-fluorobenzonitrile (1.33 g, 10.95 mmol) in THF (10.0 mL) is added, and the mixture is stirred for 2 hours at 0° C. and 10 hours at room temperature. 1N HCl (50.0 mL) is added, and the aqueous phase is extracted with EtOAc (4×50.0 mL). The combined organic phases are dried over MgSO4, filtered and concentrated on the rotovaporator. The product is purified by flash chromatography (CombiFlash), eluting with mixtures of heptanes and EtOAc (0% EtOAc to 30% EtOAc) (1.55 g, 7.38 mmol, 67%). 1H NMR (400 MHz, DMSO-D6) δ ppm 1.23-1.38 (m, 1H) 1.52-1.68 (m, 2H) 1.68-1.78 (m, 1H) 1.78-1.93 (m, 4H) 2.00-2.11 (m, 2H) 7.75 (d, J=8.79 Hz, 2H) 7.91 (d, J=8.79 Hz, 2H).

1. stirringthe mixture is stirred for 2 hours at 0° C. and 10 hours at room temperature
2. extractionthe aqueous phase is extracted with EtOAc (4×50.0 mL)
3. dry with materialThe combined organic phases are dried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated on the rotovaporator
6. customThe product is purified by flash chromatography (CombiFlash)