Multi-step reaction with 8 steps
1.1: orthoformic acid triethyl ester; acetic anhydride / 15 h / Reflux
1.2: 2.33 h / 20 - 90 °C
2.1: trichlorophosphate / 1 h / 90 °C
3.1: 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene; palladium diacetate; caesium carbonate / 1,4-dioxane / 1 h / Reflux
4.1: lithium hydroxide monohydrate; water / tetrahydrofuran; ethanol / 15 h / 50 °C
5.1: triethylamine; benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / N,N-dimethyl-formamide / 3 h / 20 °C
6.1: tetrahydrofuran; diethyl ether / 0.5 h / 20 °C / Cooling with ice
7.1: sodium tetrahydroborate; ethanol / 1 h / Cooling with ice
8.1: trifluoroacetic acid; triethylsilane / 1 h / 50 °C
With
triethylsilane; sodium tetrahydroborate; lithium hydroxide monohydrate; ethanol; water; palladium diacetate; acetic anhydride; benzotriazol-1-ol; caesium carbonate; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; orthoformic acid triethyl ester; 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene; trifluoroacetic acid; trichlorophosphate;
In
tetrahydrofuran; 1,4-dioxane; diethyl ether; ethanol; N,N-dimethyl-formamide;