反应详情

Under argon, 47.6 g (0.21 mol) of methyl 4-bromophenylacetate are initially charged in 400 ml of absolute tetrahydrofuran and, at room temperature, admixed with 320 ml of 1M sodium carbonate solution and 40 g of (0.28 mol) of 2-fluorophenylboronic acid. 7.0 g (0.01 mol) of bis(triphenylphosphane)palladium(II) chloride are added, and the mixture is then heated under reflux for 18 h. After cooling, the mixture is diluted with 500 ml of water and extracted three times with in each case 300 ml of ethyl acetate. The combined organic phases are washed with in each case 400 ml of saturated ammonium chloride solution, water and saturated sodium chloride solution, dried over magnesium sulphate and freed from the solvent under reduced pressure. Example V is obtained after silica gel filtration (petroleum ether/ethyl acetate 10:1) as a colourless oil.

1. temperaturethe mixture is then heated
2. temperatureunder reflux for 18 h
3. temperatureAfter cooling
4. extractionextracted three times with in each case 300 ml of ethyl acetate
5. washThe combined organic phases are washed with in each case 400 ml of saturated ammonium chloride solution, water and saturated sodium chloride solution
6. dry with materialdried over magnesium sulphate
7. customExample V is obtained
8. filtrationafter silica gel filtration (petroleum ether/ethyl acetate 10:1) as a colourless oil