反应详情

To a solution of 4-nitroindane-1-one (4.75 g, 26.81 mmol) in MeOH was added methoxyl amine hydrochloride (4.50 g, 53.88 mmol) and triethyl amine (7.50 mL, 53.81 mmol). After refluxing overnight, the reaction mixture was cooled to room temperature and extracted with EtOAc (3×200 mL). The combined organic extracts were washed with H2O (3×200 mL), brine (1×200 mL), dried over MgSO4 and concentrated. Purification by column chromatography using hex: Et2O (4:1) as eluant afforded 5.31 g (97% yield) of the title compound. Spectroscopic data: 1H NMR (300 MHz, CDCl3) δ (1st isomer) 2.92-2.98 (m, 2H), 3.50-3.56 (m, 2H), 4.01 (s, 3H), 7.45 (t, J=7.62 Hz, 1H), 8.00 (d, J=7.33 Hz, 1H), 8.20 (d, J=7.92 Hz, 1H). 2nd isomer: 2.90-2.98 (m, 2H), 3.49-3.58 (m, 2H), 4.02 (s, 3H), 7.45 (t, J=8.21 Hz, 1H), 8.19 (d, J=8.21 Hz, 1H), 8.66 (d, J=7.92 Hz, 1H).

1. temperatureAfter refluxing overnight
2. extractionextracted with EtOAc (3×200 mL)
3. washThe combined organic extracts were washed with H2O (3×200 mL), brine (1×200 mL)
4. dry with materialdried over MgSO4
5. concentrationconcentrated
6. customPurification by column chromatography