反应详情

To a suspension of [6-(3-fluoro-phenyl)-[1,2,4]triazin-3-yl]-hydrazine (400 mg, 0.789 mmol) in ethanol (12 mL) was added 2 N aqueous potassium hydroxide (1 mL) followed by carbon disulfide (1 mL). The reaction mixture was stirred at reflux for 1 h, then cooled to room temperature and concentrated in vacuo. The residue was dissolved with 1 N aqueous potassium hydroxide, heated and sonicated then the insolubles were filtered. The filtrate was acidified to pH 2-3 with 1 N aqueous HCl. The resulting precipitate was filtered, washed with water, and dried in vacuo to return title compound as an orange solid (242 mg, 50% yield): 1H NMR (DMSO-d6): δ 7.52 (dt, 1H), 7.70 (dt, 1H), 7.97-8.04 (m, 2H), 9.36 (s, 1H), 14.05 (s, 1H); MS (m/z) 248 [M+H+]+.

1. temperatureat reflux for 1 h
2. concentrationconcentrated in vacuo
3. dissolutionThe residue was dissolved with 1 N aqueous potassium hydroxide
4. temperatureheated
5. customsonicated
6. filtrationthe insolubles were filtered
7. filtrationThe resulting precipitate was filtered
8. washwashed with water
9. customdried in vacuo