反应详情

60% Sodium hydride in mineral oil (2.3 g, 56.8 mmol) is added to a solution of 3-hydroxy-2,2-dimethyl-propionic acid methyl ester (5.0 g, 37.8 mmol) in THF (80 mL) at 0° C., followed by the addition of benzylbromide (7.3 g, 42.6 mmol). The reaction mixture is slowly brought to room temperature, stirred for 8 h and then quenched with ice water and extracted with ethyl acetate. The organic phase is washed with water and brine, dried over Na2SO4 filtered and concentrated. The crude product is purified by column chromatography to afford 5.0 g of 3-benzyloxy-2,2-dimethyl-propionic acid methyl ester as a brown liquid; m/z 223 [M+H].

1. customis slowly brought to room temperature
2. customquenched with ice water
3. extractionextracted with ethyl acetate
4. washThe organic phase is washed with water and brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. customThe crude product is purified by column chromatography