反应详情

A solution of 4-(2-fluoropropan-2-yl)benzonitrile (Step 1, 675 mg, 4.14 mmol), hydroxylamine hydrochloride (632 mg, 9.10 mmol) and triethylamine (1.27 mL, 9.10 mmol) in ethanol (20 mL) was stirred and heated at reflux for 1 h. After being cooled to rt, the reaction mixture was evaporated to dryness. The resulting material was treated with ethyl acetate and the solid was filtered off. The ethyl acetate solution was washed with water and saturated sodium chloride solution, dried with anhydrous magnesium sulfate and filtered. After evaporation of the solvent, the title compound was obtained (756 mg, 93%): 1H NMR (400 MHz, CDCl3) δ 7.62 (d, 2H), 7.41 (d, 2H), 4.89 (broad s, 2H), 1.72 (s, 3H), 1.68 (s, 3H); ES-MS m/z 197, HPLC RT (Method F) 1.04 min.

1. temperatureheated
2. temperatureat reflux for 1 h
3. customthe reaction mixture was evaporated to dryness
4. additionThe resulting material was treated with ethyl acetate
5. filtrationthe solid was filtered off
6. washThe ethyl acetate solution was washed with water and saturated sodium chloride solution
7. dry with materialdried with anhydrous magnesium sulfate
8. filtrationfiltered
9. customAfter evaporation of the solvent