反应详情

Add acetonitrile (87 mL, 1.6 mol) to a suspension of sodium hydride (66 g, 1.6 mol) in THF (700 mL) at room temperature and stir 10 minutes. Then add 1-methyl-cyclopropanecarboxylic acid methyl ester (90.0 g, 0.78 mol) and reflux the white slurry for 3 hours. Cool the mixture, then add methanol (200 mL) and pour the mixture over water (500 mL). Separate the phases and reduce the pH of the aqueous phase with 1.0N HCl until pH 3-4. Extract the aqueous phase with diethyl ether (2×350 mL), combine the organic layers and wash with aqueous sodium chloride. Dry over sodium sulfate, filter, and concentrate under reduced pressure to give 3-(1-methyl-cyclopropyl)-3-oxo-propionitrile as yellow oil. 1H NMR (CDCl3): 3.59 (s, 2H), 1.37 (s, 3H), 1.30 (q, J=4 Hz, 2H), 0.86 (q, J=4 Hz, 2H).

1. temperatureCool the mixture
2. customSeparate the phases
3. extractionExtract the aqueous phase with diethyl ether (2×350 mL)
4. washwash with aqueous sodium chloride
5. dry with materialDry over sodium sulfate
6. filtrationfilter
7. concentrationconcentrate under reduced pressure