反応 #2439934
ord-b984e4365bf24f5dbf2bdc17a180649b
反応方程式
反応条件
後処理
- 1洗浄the organic layer was washed with water
- 2乾燥a saturated sodium hydrogencarbonate aqueous solution, a saturated sodium chloride aqueous solution, and water in the order, and the organic layer was dried with sodium sulfate
- 3濃縮The solvent was concentrated
実験手順
A mixture comprising 13.65 g (90.9 mmol) of 3-phenyl-propanoic acid, 15.0 g (90.9 mmol) of 3-bromo-dihydrofuran-2(3H)-one, 37.7 g of potassium carbonate, and 150 ml of acetone was refluxed under nitrogen current for 9 hours. To the reaction mixture were added 200 ml of water and 400 ml of ethyl acetate, the organic layer was washed with water, a saturated sodium hydrogencarbonate aqueous solution, a saturated sodium chloride aqueous solution, and water in the order, and the organic layer was dried with sodium sulfate. The solvent was concentrated to obtain 24.3 g of brown and oily tetrahydro-2-oxofuran-3-yl 3-phenylpropanoate. The oily compound (5.00 g) (21.3 mmol), 4.32 g (21.3 mmol) of diphenyl sulfoxide, 6 ml of trifluoroacetic anhydride, and 6.7 g (22.3 mmol) of 1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonic acid were stirred with ice-cooling for 3 hours, and further at room temperature for 2 hours. Chloroform (200 ml) was added to the reaction solution, the organic layer was washed with water, and the residue was purified by column chromatography (SiO2, chloroform/methanol: 10/1) to obtain 8.2 g of oily compound (A-34).