反应详情

Imidazole (9.29 g (136 mmol) was dissolved in 50 ml of DMF under nitrogen with stirring. To this solution was added 18.75 g (17.74 mmol) of t-butyldiphenylsilyl chloride and 5.27 g (5.55 mmol) of 4-pentyn-1-ol and the mixture was stirred at room temperature for 2 h. The mixture was carefully diluted with 300 ml of water, extracted with ethyl acetate, and the organic layer was washed with water, brine, and dried over magnesium sulfate. The organic solution was concentrated in vacuo to provide 22.66 g of a yellow oil which was purified by passing through 150 g pad of silica gel eluting with hexane and 3% ethyl acetate in hexane affording 17.56 g (86.8%) of the title compound as a clear oil.

1. stirringthe mixture was stirred at room temperature for 2 h
2. extractionextracted with ethyl acetate
3. washthe organic layer was washed with water, brine
4. dry with materialdried over magnesium sulfate
5. concentrationThe organic solution was concentrated in vacuo