反应详情

温度

100 °C

Benzenesulfonyl chloride (0.05 mL, 0.40 mmol) was added to a solution of 4-(2-fluoropyridin-3-yl)cyclohexanone oxime (0.075 g, 0.36 mmol) in pyridine (1 mL) at 0° C. The ice bath was removed and the mixture was stirred for 45 min before being heated to 100° C. for 30 minutes. After cooling to room temperature the pyridine was removed in vacuo and the residue was dissolved in 1:1 dioxane/water (5 mL) and stirred overnight. Ammonium chloride (50 mg) was added and stirring continued for 30 minutes. The mixture was extracted with ethyl acetate (3×), the combined extracts were dried over anhydrous magnesium sulfate, filtered, and concentrated in vacuo. The resulting oil was purified by silica gel chromatography to 5-(2-fluoropyridin-3-yl)azepan-2-one. [M+1]=209.1.

1. customThe ice bath was removed
2. temperatureAfter cooling to room temperature the pyridine
3. customwas removed in vacuo
4. dissolutionthe residue was dissolved in 1:1 dioxane/water (5 mL)
5. stirringstirred overnight
6. additionAmmonium chloride (50 mg) was added
7. stirringstirring
8. waitcontinued for 30 minutes
9. extractionThe mixture was extracted with ethyl acetate (3×)
10. dry with materialthe combined extracts were dried over anhydrous magnesium sulfate
11. filtrationfiltered
12. concentrationconcentrated in vacuo
13. customThe resulting oil was purified by silica gel chromatography to 5-(2-fluoropyridin-3-yl)azepan-2-one