Multi-step reaction with 4 steps
1: sodium methylate / methanol / 0.25 h / 20 °C
2: 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; tris-(dibenzylideneacetone)dipalladium(0); N-ethyl-N,N-diisopropylamine / 1,4-dioxane / 17 h / Reflux
3: N-benzyl-N,N,N-triethylammonium chloride; potassium hydroxide / dichloromethane; water / 4 h / 20 °C
4: benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / N,N-dimethyl-formamide / 5.5 h / 20 °C
With
tris-(dibenzylideneacetone)dipalladium(0); N-benzyl-N,N,N-triethylammonium chloride; sodium methylate; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; potassium hydroxide;
In
1,4-dioxane; methanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1038/ja.2017.114