反应详情

温度

-20 °C

Following the method of Turner and Jacks (J. Org. Chem. 1989, 54, 4229), to a stirred solution of 9.4 ml (179 mmol) acetonitrile in 250 ml dry THF under argon at −78° C. was added dropwise 78.9 ml (78.9 mmol) lithium bis(trimethylsilyl)amide solution (1M in THF) and stirring continued for 30 minutes, after which a solution of 5.0 g (35.7 mmol) methyl 3-methyl-2-furoate in 20 ml THF was added dropwise and stirring continued while the reaction mixture was allowed to warm slowly to −20° C. The reaction mixture was then cannulated into a rapidly stirred solution of 1M hydrochloric acid at 0° C. The mixtured was extracted twice with ether and the combined organic phases dried over sodium sulfate and concentrated in vacuo. Chromatography (ethyl acetate/hexane 1/4) afforded 4.43 g (83%) 3-(3-methyl-furan-2-yl)-3-oxo-propionitrile as a yellow crystalline solid. EI-MS m/e (%): 149 (M+, 20), 109 ([M—CH2CN]+, 100).

1. stirringstirring
2. extractionThe mixtured was extracted twice with ether
3. dry with materialthe combined organic phases dried over sodium sulfate
4. concentrationconcentrated in vacuo