反应详情

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0 °C

To a −78° C. solution of LDA (10 mL of a 2M solution in heptane/THF/ethylbenzene, 20.09 mmol) in THF (30 mL) was added acetonitrile (0.97 mL, 18.41 mmol) dropwise over ca. 2 min. After stirring for 15 min, a solution of 3-(cycloheptylmethoxy)benzaldehyde (3.89 g, 16.74 mmol) in THF (20 mL) was added. The reaction was allowed to warm to 0° C. over 2 h then quenched with the addition of saturated aqueous NH4Cl (30 mL). The mixture was extracted with EtOAc twice. The combined organics were dried over Na2SO4 and concentrated under reduced pressure. Purification by flash chromatography (20% EtOAc-hexanes) gave 3-(3-(cycloheptylmethoxy)phenyl)-3-hydroxypropanenitrile as a colorless oil. Yield (2.102 g, 46%): 1H NMR (400 MHz, DMSO-d6) δ 7.22 (t, J=8.0 Hz, 1H), 6.95 (d, J=2.4 Hz, 1H), 6.93 (d, J=8.0 Hz, 1H), 6.81 (ddd, J=8.4, 2.4, 0.8 Hz, 1H), 5.89 (d, J=4.4 Hz, 1H), 4.83 (dt, J=6.4, 4.8 Hz, 1H), 3.71 (d, J=6.8 Hz, 2H), 2.86 (dd, J=16.8, 5.0 Hz, 1H), 2.78 (dd, J=16.4, 6.6 Hz, 1H), 1.86-1.92 (m, 1H), 1.76-1.82 (m, 2H), 1.61-1.67 (m, 2H), 1.37-1.59 (m, 6H), 1.20-1.30 (m, 2H).*

1. customthen quenched with the addition of saturated aqueous NH4Cl (30 mL)
2. extractionThe mixture was extracted with EtOAc twice
3. dry with materialThe combined organics were dried over Na2SO4
4. concentrationconcentrated under reduced pressure
5. customPurification by flash chromatography (20% EtOAc-hexanes)