反应详情

To a 25 ml round bottom flask was added a stir bar, 246 mg (1.00 mmol) of 8-ethoxymethylene-6,8-dihydro-1-thia-3,6-diaza-as-indacen-7-one, 249 mg (1.00 mmol) of sulfapyridine and 10 ml of ethanol. The flask was fitted with a water-cooled reflux condenser, and the mixture was heated to reflux using an oil bath with stirring for 18 h. The reaction was allowed to cool and was filtered. The precipitate was washed with excess ethanol and dried under vacuum to yield 321 mg (71%) of the title compound: 1H NMR (DMSO-d6): δ11.9 (br s, 1H), 11.2 (d, 1H), 10.9 (s, 1H), 9.3 (s, 1H), 8.1 (d, 2H), 7.9 (m, 3H), 7.8 (m, 1H), 7.6 (d, 2H), 7.2 (d, 1H), 7.2 (d, 1H), 6.9 (t, 1H); C21H15N5O3S2: APCI−MS m/z 450 (M+H)+.

1. additionTo a 25 ml round bottom flask was added a stir bar
2. temperaturecooled
3. temperaturereflux condenser
4. temperaturethe mixture was heated
5. temperatureto reflux
6. temperatureto cool
7. filtrationwas filtered
8. washThe precipitate was washed with excess ethanol
9. customdried under vacuum