反应详情

温度

60 °C

To a solution of 5-chlorosalicylaldehyde (5 g, 32 mmol) (Aldrich) in N,N-dimethylformamide (40 mL) was added potassium carbonate (20 g, 145 mmol), and (2-bromo-ethoxy)-tert-butyl-dimethyl-silane (10 g, 42 mmol, Aldrich). The reaction mixture was heated at 60° C. for 18 h. The crude was cooled to room temperature, diluted with ethyl acetate, washed with water, brine. The organic layer was separated, concentrated, and the residue was purified by chromatography (EtOAc:Hexanes=1:8, then 1:4) to give 2-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxy]-5-chloro-benzaldehyde as a white solid (Yield 10 g, 99%).

1. temperatureThe crude was cooled to room temperature
2. washwashed with water, brine
3. customThe organic layer was separated
4. concentrationconcentrated
5. customthe residue was purified by chromatography (EtOAc