Multi-step reaction with 8 steps
1: acetic acid / methanol / 2.33 h / 20 °C
2: triethylamine / dichloromethane / 0 - 20 °C
3: N,N-dimethyl-formamide / 1.5 h / 80 °C
4: hydrogenchloride / methanol; water / 0.08 h / 20 °C
5: sodium methylate / methanol / 0.25 h / 20 °C
6: 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 / 4 h / Reflux
7: trifluoroacetic acid / dichloromethane / 0.5 h / 0 °C
8: sodium tris(acetoxy)borohydride; acetic acid / methanol; water / 0.5 h / 20 °C
With
hydrogenchloride; tris-(dibenzylideneacetone)dipalladium(0); sodium methylate; sodium tris(acetoxy)borohydride; acetic acid; triethylamine; N-ethyl-N,N-diisopropylamine; 4,5-bis(diphenylphos4,5-bis(diphenylphosphino)-9,9-dimethylxanthenephino)-9,9-dimethylxanthene; trifluoroacetic acid;
In
1,4-dioxane; methanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1038/ja.2017.114