反应详情

温度

0 °C

Combine oxalyl chloride (2.71 g, 21.4 mmol) and toluene (20 mL). Cool to 0° C. Add N,N-dimethylformamide (1.62 g, 22.2 mmol) as a solution in toluene (2 mL). Warm to ambient temperature. After 10 minutes, cool to 0° C. Add (E)-2-(fluoromethylene)-4-(p-fluorophenyl)butan-1-ol (4.0 g, 20.2 mmol). Warm to ambient temperature. After 18 hours, pour the reaction mixture into a saturated sodium chloride solution (100 mL). Extract the aqueous layer 3 times with toluene. Dry the combined organic layers over Na2SO4, filter, and evaporate in vacuo to give the title compound. 1H NMR (CDCl3, 300 MHz) δ 2.52 (m, 2H), 2.75 (m, 2H), 3.91 (d, J=6 Hz, 2H), 6.65 (d, J=82.5 Hz, 1H), 6.95 (m, 2H), 7.15 (m, 2H).

1. temperatureWarm to ambient temperature
2. temperaturecool to 0° C
3. temperatureWarm to ambient temperature
4. waitAfter 18 hours
5. extractionExtract the aqueous layer 3 times with toluene
6. dry with materialDry the combined organic layers over Na2SO4
7. filtrationfilter
8. customevaporate in vacuo