反应详情

To an anhydrous solution of potassium tert-butoxide (2.3 g, 19.5 mmol) in THF (500 mL), tetraethylene glycol (7.18 g, 37.0 mmol) is added at room temperature. The resulting mixture is stirred for 30 min, and a solution of allyl iodide (3.31 g, 19.7 mmol) in dry THF (60 mL) is added dropwise over 1 h. The reaction mixture is stirred for 30 h and filtered through a silica plug (10 g) using ethyl acetate (800 mL) to elute all product. After evaporation of the solvent in vacuo, the product is purified by column chromatography using a solvent gradient petrol ether/ethyl acetate 10:1 to ethyl acetate 100% yielding a colourless oil (2.41 g, 10.3 mmol, 27%).

1. stirringThe reaction mixture is stirred for 30 h
2. filtrationfiltered through a silica plug (10 g)
3. washto elute all product
4. customAfter evaporation of the solvent in vacuo
5. customthe product is purified by column chromatography