反应详情

温度

-55 °C

A solution of ethyl p-chloro-β-cyclopropyl-α-fluorocinnamate, (E)- and (Z)- (32.25 g, 0.12 mol) in ether is added dropwise to a mixture of lithium aluminum hydride (5.46 g, 0.144 mol) in ether while maintaining the temperature at −55° C. After the addition is complete, the reaction mixture is warmed to and stirred at −20° C. for 90 minutes, quenched sequentially with ethyl acetate, methanol and 2 N hydrochloric acid, and extracted with ether. The organic extracts are combined, washed sequentially with water, saturated sodium hydrogen carbonate solution and water, dried over anhydrous sodium sulfate, and concentrated in vacuo to give the title product as a colorless oil (26.4 g, 97%).

1. additionAfter the addition
2. temperaturethe reaction mixture is warmed to and
3. customquenched sequentially with ethyl acetate, methanol and 2 N hydrochloric acid
4. extractionextracted with ether
5. washwashed sequentially with water, saturated sodium hydrogen carbonate solution and water
6. dry with materialdried over anhydrous sodium sulfate
7. concentrationconcentrated in vacuo