Multi-step reaction with 16 steps
1: ammonium hydroxide / water / 2 h / 70 °C
2: Lawessons reagent / toluene / 2 h / Reflux
3: ethanol / 2 h / Reflux
4: selenium(IV) oxide / acetic acid / 12 h / Reflux
5: tetrahydrofuran / 0.5 h / 20 °C
6: Dess-Martin periodane / dichloromethane / 2 h / 20 °C
7: ammonium acetate / 12 h / Reflux
8: potassium carbonate / ethanol; dichloromethane
9: 1H-imidazole / N,N-dimethyl-formamide / 24 h / 20 °C
10: lithium hydroxide / tetrahydrofuran; water / 2 h
11: dmap; triethylamine / dichloromethane / 3 h / Inert atmosphere
12: BOP-Cl; triethylamine / acetonitrile / 3 h
13: triethylamine / dichloromethane / 1 h / 20 °C / Inert atmosphere
14: 1,8-diazabicyclo[5.4.0]undec-7-ene / dichloromethane / 1 h / Inert atmosphere
15: tetrabutyl ammonium fluoride / tetrahydrofuran / 3 h
16: Dess-Martin periodane / dichloromethane / 2 h
With
Lawessons reagent; 1H-imidazole; dmap; selenium(IV) oxide; ammonium hydroxide; BOP-Cl; ammonium acetate; tetrabutyl ammonium fluoride; potassium carbonate; Dess-Martin periodane; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; lithium hydroxide;
In
tetrahydrofuran; ethanol; dichloromethane; water; acetic acid; N,N-dimethyl-formamide; toluene; acetonitrile;
7: Bohlmann-Rahtz reaction;
DOI:10.1021/ja110166x