反应详情

To a solution of 5-fluoro-4-iodo-1H-pyrrolo[2,3-b]pyridine (5.0 g, 0.019 mol) in DMF (30.0 mL) cooled at 0° C. under nitrogen was portionwise added sodium hydride (1.13 g, 0.0282 mol). The reaction was stirred for 1 hour. To the mixture was slowly added [β-(trimethylsilyl)ethoxy]methyl chloride (4.05 mL, 0.0229 mol). The reaction was stirred at 0° C. for 1 hour and quenched with water. The resulting solution was extracted with EtOAc (2 times). The combined extracts were washed with water, brine, dried over sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography, eluting with 0-25% EtOAc/hexanes to afford 7.1 g (95%) of 5-fluoro-4-iodo-1-{[2-(trimethylsilyl)ethoxy]methyl}-1H-pyrrolo[2,3-b]pyridine as a yellowish oil. LC/MS found: 393.0 (M+H)+.

1. stirringThe reaction was stirred at 0° C. for 1 hour
2. customquenched with water
3. extractionThe resulting solution was extracted with EtOAc (2 times)
4. washThe combined extracts were washed with water, brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel chromatography
8. washeluting with 0-25% EtOAc/hexanes