反应详情

Add TBSCl (3.37 g, 22.37 mmol) and imidazole (1.9 g, 27.96 mmol) to a solution of 3-bromo-4-fluoro-phenol (3.56 g 18.64 mmol) in CH2Cl2 (60 ml). Stir the solution at ambient temperature for 3 hours. Quench the reaction with water (30 mL). Extract the aqueous layer with CH2Cl2 (30 mL×3). The combined organic layers are washed with brine, dried over Na2SO4, concentrated under vacuum. The residue is purified by silica gel chromatography (petroleum ether) to give (3-bromo-4-fluoro-phenoxy)-tert-butyl-dimethyl-silane as colorless oil (5.81 g, 99%), MS (m/z): 303 (M−1).

1. customQuench
2. customthe reaction with water (30 mL)
3. extractionExtract the aqueous layer with CH2Cl2 (30 mL×3)
4. washThe combined organic layers are washed with brine
5. dry with materialdried over Na2SO4
6. concentrationconcentrated under vacuum
7. customThe residue is purified by silica gel chromatography (petroleum ether)