反应详情

温度

-78 °C

9.4 g of 18-crown-6 and 1.7 ml of methyl [bis(2,2,2-trifluoroethoxy)-phosphoryl]acetate are dissolved under argon in 120 ml of dry tetrahydro-furan and cooled to −78° C. 14.3 ml of a 0.5 molar solution of potassium bis(trimethylsilyl)amide in toluene are added to this mixture, followed by 0.85 ml of benzaldehyde. After stirring at −78° C. for thirty minutes, the reaction mixture is quenched by adding saturated ammonium chloride solution and extracted with five portions each of 50 ml of ethyl acetate. The combined organic phases are dried over MgSO4 and then the solvent is removed in vacuo. The residue is purified on silica gel with n-heptane:ethyl acetate=20:1 as eluent. 1.1 g of methyl (Z)-3-phenylacrylate are obtained as an oil.

1. customthe reaction mixture is quenched
2. additionby adding saturated ammonium chloride solution
3. extractionextracted with five portions each of 50 ml of ethyl acetate
4. dry with materialThe combined organic phases are dried over MgSO4
5. customthe solvent is removed in vacuo
6. customThe residue is purified on silica gel with n-heptane