反应详情

10 g (66.7 mmol) of tetramethylhydroquinone are dissolved in 100 ml of dry tetrahydrofuran, 4 g (139 mmol) of sodium hydride (80% in mineral oil) are added thereto at room temperature, 45 ml of butyllithium (1.6 molar in hexane) are subsequently added dropwise and the mixture is stirred for 1 hour. 10 g (44.3 mmol) of 1,2-epoxy -2,6,10,14-tetramethylpentadecane are now added dropwise; the mixture is left to react for 12 hours while stirring. 100 ml of 1N methanolic hydrochloric acid are added and the mixture is stirred at 50° C. for 2 hours. The mixture is subsequently concentrated at 50° C. and the residue is chromatographed on silica gel with toluene, whereby there are obtained 14.9 g (75%) of α-tocopherol.

1. waitthe mixture is left
2. customto react for 12 hours
3. stirringwhile stirring
4. stirringthe mixture is stirred at 50° C. for 2 hours
5. concentrationThe mixture is subsequently concentrated at 50° C.
6. customthe residue is chromatographed on silica gel with toluene, whereby there