Multi-step reaction with 6 steps
1: sodium hydroxide / methanol / 2 h / Reflux
2: N-ethyl-N,N-diisopropylamine; trichlorophosphate / 18 h / Reflux
3: sodium carbonate; bis-triphenylphosphine-palladium(II) chloride / 1,4-dioxane / 2 h / Reflux; Inert atmosphere
4: palladium diacetate; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl; caesium carbonate / 1,4-dioxane / 13 h / Reflux; Inert atmosphere
5: sodium hydroxide / methanol; tetrahydrofuran / 5 h / Reflux
6: N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate / N,N-dimethyl-formamide / 17 h / 80 °C / Inert atmosphere
With
bis-triphenylphosphine-palladium(II) chloride; palladium diacetate; sodium carbonate; caesium carbonate; 2,2'-bis-(diphenylphosphino)-1,1'-binaphthyl; N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate; sodium hydroxide; trichlorophosphate;
In
tetrahydrofuran; 1,4-dioxane; methanol; N,N-dimethyl-formamide;
3: |Suzuki-Miyaura Coupling / 4: |Buchwald-Hartwig Coupling;
DOI:10.1007/s00044-014-0959-3