反应详情

温度

25 °C

A mixture of 5-chloro-6-methoxypyridin-3-ol (Preparation 77, 100 mg, 0.627 mmol), tert-butyl 2,4,5-trifluorobenzoate (Preparation 6, 147 mg, 0.633 mmol), and potassium carbonate (260 mg, 1.88 mmol) in DMSO (5 ml) was stirred overnight at 25° C. under a nitrogen atmosphere. The reaction was diluted with water (50 mL) and extracted with EtOAc (3×30 mL). The combined organics were washed with aqueous sodium hydroxide solution (1.0 M, 30 mL), brine (2×40 mL), dried over sodium sulfate, filtered and concentrated in vacuo. The crude was purified by silica gel chromatography eluting with 5% EtOAc in heptane to afford the title compound as a white solid (65 mg, 28%):

1. extractionextracted with EtOAc (3×30 mL)
2. washThe combined organics were washed with aqueous sodium hydroxide solution (1.0 M, 30 mL), brine (2×40 mL)
3. dry with materialdried over sodium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe crude was purified by silica gel chromatography
7. washeluting with 5% EtOAc in heptane