反应详情

温度

80 °C

A mixture of 5-(6-bromo-pyridin-2-yl)-5-methyl-morpholin-3-one (4.65 g, 17.15 mmol) and P2S5 (4.57 g, 20.58 mmol) in pyridine (60 ml) was stirred at 80° C. under N2 for 6 h. The reaction mixture was cooled to rt and diluted with 0.5N aq. HCl and EtOAc. The phases were separated and the aq. phase was twice extracted with EtOAc. The combined org. phases were washed with brine, dried over Na2SO4, filtered and concentrated. The title compound was obtained as a pale yellow solid after flash chromatography on silica gel (cyclohexane/EtOAc 100:0 to 75:25). HPLC RtH4=0.89 min; ESIMS: 287, 289 [(M+H)+]; 1H NMR (400 MHz, DMSO-d6): δ 11.15 (s, 1H), 7.86-7.82 (m, 1H), 7.61 (dd, 1H), 7.39 (dd, 1H), 4.44-4.34 (d, 2H), 4.13 (d, 1H), 3.74 (d, 1H), 1.52 (s, 3H).

1. temperatureThe reaction mixture was cooled to rt
2. customThe phases were separated
3. extractionthe aq. phase was twice extracted with EtOAc
4. washphases were washed with brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated