反应详情

To a solution of methylmagnesium bromide (221 ml, 665 mmol) in 800 ml THF at 0° C. was added 1-(2-hydroxy-5-methoxy-phenyl)-ethanone (20.21 g, 302 mmol) in portions over 30 min. The mixture was allowed to warm to room temperature. After 16 h the mixture was quenched by the slow addition of 10% NH4Cl, carefully acidified to pH=1 (slow addition) with concentrated HCl and extracted with Et2O. The combined organics were washed with H2O, washed with brine, died over MgSO4, filtered and concentrated in vacuo to give 2-(1-hydroxy-1-methyl-ethyl)-4-methoxy-phenol (50.57 g, 100%) as a tan solid.

1. customAfter 16 h the mixture was quenched by the slow addition of 10% NH4Cl
2. additioncarefully acidified to pH=1 (slow addition) with concentrated HCl
3. extractionextracted with Et2O
4. washThe combined organics were washed with H2O
5. washwashed with brine
6. filtrationfiltered
7. concentrationconcentrated in vacuo