反应详情

6-Bromo-7-chloro-3-{[2-(trimethylsilyl)ethoxy]methyl}-3H-imidazo[4,5-b]pyridine (379 mg, 1.05 mmol) in toluene (6 mL) was stirred with bis(triphenylphosphine)palladium(II) dichloride (106 mg, 0.151 mmol) and tributyl(1-ethoxyvinyl)tin (435 mg, 1.21 mmol) at 120° C. 4 hours. The reaction mixture was allowed to cool to room temperature and stirred with water (20 mL) and potassium fluoride (0.5 g) at room temperature for 1 hour. The reaction mixture was extracted with ethyl acetate, and the organic layer was dried over anhydrous magnesium sulfate and filtered. The filtrate was stirred with hydrogen chloride-methanol solution (10 wt %, 4 mL) at room temperature for 10 minutes. The reaction mixture was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane/ethyl acetate=5/1→3/1 (v/v)) to give the title compound as a yellow solid (89.6 mg, yield 26%).

1. custom4 hours
2. extractionThe reaction mixture was extracted with ethyl acetate
3. dry with materialthe organic layer was dried over anhydrous magnesium sulfate
4. filtrationfiltered
5. concentrationThe reaction mixture was concentrated under reduced pressure
6. customthe residue was purified by silica gel column chromatography (hexane/ethyl acetate=5/1→3/1 (v/v))