反应详情

Potassium fluoride (94 mg, 1.60 mmol) and tetraphenylphosphonium bromide (134 mg, 0.32 mmol) were added to a solution of 2-chloro-5-[(3-chloropyridin-4-yl) (2,5-difluorophenyl)methylsulfonyl]pyridine (66 mg, 0.16 mmol) in acetonitrile (2 ml). The resulting mixture was heated under reflux for 16 hours. The reaction mixture was cooled to room temperature. Dichloromethane was added and the mixture was washed with water. The organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated under reduced pressure. The residue was subjected to flash chromatography on a silica gel column and a fraction obtained from the elution portion with hexane:ethyl acetate=17:3 was concentrated under reduced pressure, whereby the title compound (4.5 mg, 0.011 mmol, 7%) was obtained as a white solid.

1. temperatureThe resulting mixture was heated
2. temperatureunder reflux for 16 hours
3. washthe mixture was washed with water
4. dry with materialThe organic layer was dried over anhydrous sodium sulfate
5. filtrationfiltered
6. concentrationThe filtrate was concentrated under reduced pressure
7. customa fraction obtained from the elution portion with hexane