反应详情

温度

67.5 °C

A mixture of 3-bromo-2-tert-butylsulfanyl-benzaldehyde (6.7 g, 25 mmol) and hydroxylamine hydrochloride (7.9 g, 116 mmol) in 2-propanol (200 mL) and water (40 mL) was heated to 65-70° C. overnight. 2-Propanol was evaporated and water (150 mL) was added to the residue followed by saturated aqueous sodium bicarbonate to bring the pH to ˜8.5. The mixture was extracted with DCM (3×80 mL). The combined organic fractions were dried over sodium sulfate, filtered, and concentrated to afford the title compound, which was used immediately without further purification. 1H NMR (300 MHz, CD3OD): δ 1.28 (s, 9H), 7.25-7.35 (t, J=7.8 Hz, 1H), 7.79 (d, J=6.6 Hz, 1H), 7.89 (d, J=6.3 Hz, 1H), 8.83 (s, 1H).

1. custom2-Propanol was evaporated
2. additionwater (150 mL) was added to the residue
3. extractionThe mixture was extracted with DCM (3×80 mL)
4. dry with materialThe combined organic fractions were dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated