Multi-step reaction with 9 steps
1.1: sodium amide / N,N-dimethyl-formamide / 16 h / 100 °C / Inert atmosphere
2.1: hexamethylenetetramine / water / Inert atmosphere; Reflux
3.1: sodium hydride / N,N-dimethyl-formamide / 0.17 h / 0 °C / Inert atmosphere
3.2: 3 h / 0 °C / Inert atmosphere
4.1: sodium tetrahydroborate / ethanol / 2 h / 20 °C
5.1: triethylamine; thionyl chloride / dichloromethane / -10 - 20 °C / Inert atmosphere
6.1: n-butyllithium / tetrahydrofuran / 0.5 h / -78 °C / Inert atmosphere
6.2: -78 - 20 °C / Inert atmosphere
7.1: hydrogenchloride / tetrahydrofuran; water / 2 h / 0 - 20 °C
8.1: potassium carbonate / water; 1,4-dioxane / 12 h / 20 °C / Inert atmosphere
9.1: caesium carbonate / methanol; tetrahydrofuran / 2 h / 20 °C / Inert atmosphere
With
hydrogenchloride; sodium tetrahydroborate; n-butyllithium; thionyl chloride; hexamethylenetetramine; sodium hydride; potassium carbonate; caesium carbonate; sodium amide; triethylamine;
In
tetrahydrofuran; 1,4-dioxane; methanol; ethanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1021/ol403429e