반응 #77561

반응 방정식

Water

3,5-dimethoxyphenol

imidazole

t-butylchlorodiphenylsilane

→

1-t-butyldiphenylsiloxy-3,5-dimethoxybenzene

수율 94.1%

용매

dimethylformamide

반응 조건

후처리

1. 1
   추출the mixture was extracted with ethyl acetate-hexane (1:2)
2. 2
   세척The organic layer was washed with water
3. 3
   건조dried over anhydrous sodium sulfate
4. 4
   농축concentrated under reduced pressure
5. 5
   기타The residue was purified by column chromatography on silica gel

실험 절차

To a solution of 3,5-dimethoxyphenol (6.73 g, 43.7 mmol) in anhydrous dimethylformamide (50 mL) were added imidazole (5.95 g, 87.4 mmol) and t-butylchlorodiphenylsilane (15.0 g, 54.6 mmol), and the mixture was stirred at 50° C. for 4 hours. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate-hexane (1:2). The organic layer was washed with water, dried over anhydrous sodium sulfate, and then concentrated under reduced pressure. The residue was purified by column chromatography on silica gel to yield 1-t-butyldiphenylsiloxy-3,5-dimethoxybenzene as a colorless crystalline powder (melting point: 95.5-96.5° C.) (16.14 g, yield: 94%).

출처