反应详情

Thionyl chloride (116 mL, 1586 mmol) was added dropwise over 1 hour to a turbid solution of (2,4-dimethoxyphenyl)methanol (97.00 g, 577 mmol) and pyridine (93 mL, 1153 mmol) in anhydrous Et2O (1153 mL) at 0° C. under nitrogen with mechanical stirring. After 1 hour the reaction mixture was poured into 2 L of ice water and the layers were separated. The aqueous layer was extracted with Et2O (2×1 L) and the organics were pooled, washed with ice water (1.2 L), cold 5:1 sat. aq. NaCl solution/sat. aq. NaHCO3 (1.2 L), dried (MgSO4), filtered and most of the ether was removed in vacuo at 12° C. Benzene (300 mL) was added and the mixture was concentrated at 12° C. until 100 mL of benzene remained to provide a solution of 1-(chloromethyl)-2,4-dimethoxybenzene.

1. customthe layers were separated
2. extractionThe aqueous layer was extracted with Et2O (2×1 L)
3. washwashed with ice water (1.2 L), cold 5:1 sat. aq. NaCl solution/sat
4. dry with materialaq. NaHCO3 (1.2 L), dried (MgSO4)
5. filtrationfiltered and most of the ether
6. customwas removed in vacuo at 12° C
7. additionBenzene (300 mL) was added
8. concentrationthe mixture was concentrated at 12° C. until 100 mL of benzene