反应详情

温度

115 °C

70% Aqueous tert-butyl hydroperoxide (140 g, 1.09 mol) is added over a 6-hour period to a mixture of 75.4 g (0.157 mol) of bis(2,2,6,6-tetramethylpiperidin-4-yl) sebacate, 1.25 g (8.7 mmol) of molybdenum trioxide and 570 ml of n-octane, that is first heated to 115° C., under a nitrogen atmosphere. During the addition, the reaction mixture is maintained at reflux. Water is collected in a Dean-Stark trap. Upon completion of the addition, the red reaction mixture is heated at reflux (95°-97° C.) for seven hours to discharge the red color. The molybdenum trioxide is removed by filtration. The yellow filtrate is stirred at ambient temperature for 30 minutes with 15 g of activated charcoal (DARCO) to remove some of the yellow color before being concentrated under reduced pressure. The crude product is purified by flash chromatography on silica gel (100:3 heptane:ethyl acetate) to afford 92.9 g (80% yield) of the title compound as a colorless oil.

1. additionDuring the addition
2. temperaturethe reaction mixture is maintained
3. temperatureat reflux
4. customWater is collected in a Dean-Stark trap
5. additionUpon completion of the addition
6. customthe red reaction mixture
7. temperatureis heated
8. temperatureat reflux (95°-97° C.) for seven hours
9. customThe molybdenum trioxide is removed by filtration
10. customto remove some of the yellow color
11. concentrationbefore being concentrated under reduced pressure
12. customThe crude product is purified by flash chromatography on silica gel (100:3 heptane:ethyl acetate)