Multi-step reaction with 15 steps
1: manganese(IV) oxide / dichloromethane / 3 h / 20 °C
2: dichloromethane / 12 h / 20 °C
3: caesium carbonate / N,N-dimethyl-formamide / 18 h / 60 °C
4: palladium on carbon; hydrogen / ethanol / 12 h / 760.05 Torr
5: potassium tert-butylate / tetrahydrofuran / 20 h / 20 °C
6: silica gel / toluene / 2 h / Reflux
7: sodium tetrahydroborate / tetrahydrofuran / 1 h / 0 °C
8: triethylamine / dichloromethane / 0.5 h / -40 °C
9: sodium azide / N,N-dimethyl-formamide / 12 h / 60 °C
10: palladium on carbon; hydrogen / methanol / 12 h / 20 °C
11: dmap; triethylamine / dichloromethane / 4 h / 20 °C
12: sodium hydride / N,N-dimethyl-formamide / 3 h / 0 - 20 °C
13: dichloromethane / 1 h / 0 °C
14: dichloromethane / 1 h / 20 °C
15: sodium tetrahydroborate / tetrahydrofuran / 1 h / 0 °C
With
dmap; manganese(IV) oxide; sodium tetrahydroborate; sodium azide; palladium on carbon; potassium tert-butylate; hydrogen; silica gel; sodium hydride; caesium carbonate; triethylamine;
In
tetrahydrofuran; methanol; ethanol; dichloromethane; N,N-dimethyl-formamide; toluene;
2: Wittig reaction / 5: Dieckmann reaction;
DOI:10.1016/j.bmcl.2011.03.085