反应详情

Triethylamine (10 mL) is added to dry cuprous iodide (52 mg) under nitrogen. The mixture is stirred for 5 minutes. Propargyl alcohol (50 μL) is added. After stirring another 5 minutes, dichlorobis(triphenylphosphine)palladium(II) (48 mg) is added. The mixture is again stirred for 5 minutes before the addition of ethyl 6-chloro-4-hydroxy[1,5]naphthyridine-3-carboxylate (Preparation 1, 348 mg) and DMF (10 mL). After stirring another 5 minutes, the remaining propargyl alcohol (660 μL) is added, and the reaction is tightly capped and stirred at 70° C. for 11 hours. After cooling, the mixture is diluted with ether (75 mL), sonicated to break up any solids, and filtered. The collected solid is washed with ether, dried under vacuum and recrystallized from ethanol.

1. stirringAfter stirring another 5 minutes
2. stirringAfter stirring another 5 minutes
3. customthe reaction is tightly capped
4. stirringstirred at 70° C. for 11 hours
5. temperatureAfter cooling
6. customsonicated
7. filtrationfiltered
8. washThe collected solid is washed with ether
9. customdried under vacuum
10. customrecrystallized from ethanol