反应详情

To 1-Benzyloxy-4-bromo-2,5-difluoro-benzene (47, 0.84 g, 2.80 mmol) in tetrahydrofuran (15.0 mL) and ether (15.0 mL), under an atmosphere of nitrogen at −78° C., n-butyllithium (1.20 mL, 2.50 M in hexane) was added slowly. After 20 minutes, 1-Triisopropylsilanyl-1H-pyrrolo[2,3-b]pyridine-3-carbaldehyde (8, 0.82 g, 0.0027 mol, prepared as described in Example 5) was added to the reaction. After 20 minutes, the reaction was allowed to warm to room temperature for 10 minutes, then poured into water and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified with silica gel column chromatography eluting with 20% ethyl acetate in hexane to a white solid (48, 10 g, 70.0%).

1. waitAfter 20 minutes
2. extractionextracted with ethyl acetate
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. filtrationfiltered
5. concentrationThe filtrate was concentrated
6. custompurified with silica gel column chromatography
7. washeluting with 20% ethyl acetate in hexane to a white solid (48, 10 g, 70.0%)