反应详情

A 100-mL round-bottomed flask equipped with a magnetic stirrer and a reflux condenser was charged with 150g (550 mg, 1.0 eq., 2.38 mmol), hydroxylamine hydrochloride (827 mg, 5.0 eq., 11.9 mmol), and ethanol (30 mL). The mixture was refluxed for 2 days. It was then cooled to room temperature and filtered. The filtrate was concentrated under reduced pressure. The residue was purified by reverse-phase prep-HPLC to afford 150h (30 mg, 8%) as a yellow oil. MS-ESI: [M+H]+ 154.1. 1H NMR (500 MHz, CDCl3) δ 5.37 (s, 1H), 4.73 (q, J=7.0 Hz, 1H), 4.26-4.23 (m, 1H), 4.08-4.03 (m, 1H), 3.91-3.90 (m, 1H), 3.90-3.87 (m, 1H), 1.65 (d, J=7.0 Hz, 3H).

1. customA 100-mL round-bottomed flask equipped with a magnetic stirrer and a reflux condenser
2. temperatureThe mixture was refluxed for 2 days
3. filtrationfiltered
4. concentrationThe filtrate was concentrated under reduced pressure
5. customThe residue was purified by reverse-phase prep-HPLC