反应详情

温度

100 °C

1 g of 3,5-difluoro-4-(hydroxymethyl)phenol (6.245 mmol, 1 eq.) were dissolved in 16 ml of DMF 1.047 g of sodium chloro(difluoro)acetate (6.87 mmol, 1.1 eq.), 2.442 g of cesium carbonate (7.494 mmol, 1.2 eq.) and 400 μl of water were added. The mixture was stirred at 100° C. bath temperature for 2 hours under nitrogen atmosphere. Then the reaction mixture was partitioned between water and ethyl acetate. The separated aqueous layer was extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over a silicone filter and concentrated in vacuo. The residue was purified by flash chromatography to yield 763.3 mg (3.63 mmol, 58.2%) of the analytically pure target compound.

1. additionwere added
2. customThen the reaction mixture was partitioned between water and ethyl acetate
3. extractionThe separated aqueous layer was extracted twice with ethyl acetate
4. washThe combined organic layers were washed with brine
5. dry with materialdried over a silicone
6. filtrationfilter
7. concentrationconcentrated in vacuo
8. customThe residue was purified by flash chromatography
9. customto yield 763.3 mg (3.63 mmol, 58.2%) of the analytically pure target compound