反应详情

A mixture containing 7.8 g of 3-ethyl-4-methylene-2-oxo-1-oxa-3,8-diazaspiro[4,5]decane, 8.5 ml of anhydrous triethylamine, 80 ml of anhydrous methyl ethyl ketone, 0.3 g of potassium iodide and 16.7 g of 4,4-bis(4-fluorophenyl)-3-butenyl chloride is refluxed under nitrogen while stirring for 15 hours, then the solvent is distilled off under reduced pressure. After adding benzene and water to the residue, the benzene layer is washed with water to neutral, dried over anhydrous magnesium sulfate, filtered through an aluminum oxide bed and evaporated under reduced pressure. After recrystallizing the residue from ethanol, the title product is obtained in 68.7% yield, m.p.: 138°-139° C.

1. temperatureis refluxed under nitrogen
2. distillationthe solvent is distilled off under reduced pressure
3. additionAfter adding benzene and water to the residue
4. washthe benzene layer is washed with water to neutral,
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered through an aluminum oxide bed
7. customevaporated under reduced pressure
8. customAfter recrystallizing the residue from ethanol