反応 #354445

反応方程式

hydrogen peroxide

potassium bicarbonate

benzonitrile

racemic 9,10-dioxatricyclo[4,3,1,03,8 ]dec-4-ene

→

Benzamide

溶媒

Methylene chloride

methanol

反応条件

後処理

1. 1
   洗浄is washed with 2% sodium hydrogen carbonate solution
2. 2
   乾燥dried over sodium sulphate
3. 3
   濃縮concentrated

実験手順

To a solution of 165 mg of racemic 9,10-dioxatricyclo[4,3,1,03,8 ]dec-4-ene in 4 ml of methanol are added, with stirring and at room temperature 865 mg of potassium bicarbonate and 740 mg of benzonitrile. To this mixture are added at intervals of 8 hours 5 portions each of 0.3 ml of 30% hydrogen peroxide and stirring is continued for 10 hours. Methylene chloride (25 ml) is then added to the reaction mixture, which is washed with 2% sodium hydrogen carbonate solution, dried over sodium sulphate and concentrated. Benzamide which has formed is removed by crystallisation from methylene chloride/pentane. The residual oil can be used directly in the next reaction, or chromatographed on 22 g of basic aluminium oxide (activity level IV). Elution with petroleum ether/benzene (7:3) yields the racemic mixture of 4β,5β-epoxy-9,10-dioxatricyclo[4,3,1,03,8 ]decane of the formula ##SPC18##

出典