反应详情

A solution of 50 ml of tetrahydrofuran containing 2.5 g (15.4 mmoles) of 1-hydroxyethylbenzimidazole, 2.3 g (15.4 mmoles) of t-butyldimethylsilyl chloride and 1.0 g (15.4 mmoles) of imidazole was allowed to stir overnight at room temperature. The reaction mixture was poured into water and the product extracted with ethyl acetate (2×100 ml). The combined extracts were dried over magnesium sulfate and concentrated in vacuo to a colorless oil, 3.5 g. The intermediate was purified by chromatography on 100 g of silica gel using chloroform as the eluent, 3.11 g.

1. extractionthe product extracted with ethyl acetate (2×100 ml)
2. dry with materialThe combined extracts were dried over magnesium sulfate
3. concentrationconcentrated in vacuo to a colorless oil, 3.5 g
4. customThe intermediate was purified by chromatography on 100 g of silica gel