反应详情

温度

100 °C

Selenious acid (645 mg, 5.00 mmol, 1.1 equiv) was added to a solution of (6-chloro-3-methyl-quinoxalin-5-yl)-acetic acid methyl ester in dioxane (30 ml). The reaction mixture was heated to 100° C. After 60 minutes, an additional portion of selenious acid (645 mg) was added, and heating was continued for another 60 minutes. After cooling, the reaction mixture was diluted with water, filtered, and extracted with EtOAc. The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified via flash chromatography (gradient of hexane/EtOAc 100:0 to 80:20) to afford the title compound (966 mg, 81%). MS (ES+): 264 (M+H)+.

1. temperatureheating
2. waitwas continued for another 60 minutes
3. temperatureAfter cooling
4. filtrationfiltered
5. extractionextracted with EtOAc
6. washThe combined organic layers were washed with brine
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated in vacuo
10. customThe residue was purified via flash chromatography (gradient of hexane/EtOAc 100:0 to 80:20)