Multi-step reaction with 11 steps
1.1: potassium carbonate / ethanol / 2 h / Reflux
1.2: 1 h / Reflux
2.1: acetic acid; dihydrogen peroxide / water; dichloromethane / 1.5 h / 20 - 35 °C
3.1: caesium carbonate; tetrakis(triphenylphosphine) palladium(0) / 1,4-dioxane / 18 h / Reflux
4.1: diphenylphosphoranyl azide; 1,8-diazabicyclo[5.4.0]undec-7-ene / tetrahydrofuran / 3 h / Reflux
5.1: hydrogen; palladium 10% on activated carbon / ethanol / 12 h / 20 °C / 760.05 Torr
6.1: tetraethoxy orthosilicate / ethanol / 5 h / Reflux
7.1: N,N-dimethyl-formamide / 4 h / 140 °C / Inert atmosphere
8.1: water / 1,4-dioxane / 8 h / Reflux
9.1: potassium iodide; 1,8-diazabicyclo[5.4.0]undec-7-ene / acetonitrile / 5 h / 20 °C
10.1: manganese(IV) oxide / 1,4-dioxane / 3 h / 70 °C
11.1: sodium tris(acetoxy)borohydride; N-ethyl-N,N-diisopropylamine / dichloromethane / 2 h / 20 °C
With
manganese(IV) oxide; tetrakis(triphenylphosphine) palladium(0); tetraethoxy orthosilicate; palladium 10% on activated carbon; diphenylphosphoranyl azide; water; hydrogen; dihydrogen peroxide; sodium tris(acetoxy)borohydride; potassium carbonate; caesium carbonate; acetic acid; 1,8-diazabicyclo[5.4.0]undec-7-ene; N-ethyl-N,N-diisopropylamine; potassium iodide;
In
tetrahydrofuran; 1,4-dioxane; ethanol; dichloromethane; water; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1016/j.bmcl.2013.01.029