反应详情

温度

65 °C

Tributylamine (6.6 mL 28 mmol) was added to a stirred suspension of 3-(4-chlorophenylsulfanyl)-2-methyl-4,5,6,7-tetrahydro-1H-indol-4-one (8.0 g, 27 mmol) and hydroxylamine hydrochloride (1.9 g, 27 mmol) in ethanol (40 mL). The mixture was heated to 65° C. and maintained at this temperature for 4 h then allowed to cool to r.t. and left overnight. Additional hydroxylamine hydrochloride (0.15 g, 2.2 mmol) and tributylamine (1.0 mL, 4.2 mmol) were added and the mixture was re-heated to 65° C. for a further 2 h. After cooling to r.t., the solid product was collected by filtration, washed with ethanol (2×10 mL) then dried in a vacuum oven at 40° C. to give the title compound as an off-white solid; 5.71 g (68%); purity: 96.3 area % by HPLC; m/z: 307/309 (MH+); 1H-NMR: 11.26 (1H, s), 10.20 (1H, s), 7.23 (2H, m), 6.92 (2H, m), 2.62-2.58 (2H, m), 2.56-2.52 (2H, m), 2.12 (3H, s), 2.83-1.76 (2H, m).

1. temperaturemaintained at this temperature for 4 h
2. temperatureto cool to r.t.
3. temperaturethe mixture was re-heated to 65° C. for a further 2 h
4. temperatureAfter cooling to r.t.
5. filtrationthe solid product was collected by filtration
6. washwashed with ethanol (2×10 mL)
7. customthen dried in a vacuum oven at 40° C.