Multi-step reaction with 8 steps
1.1: calcium sulfate; silver(l) oxide / acetonitrile / 48 h / 20 °C / Darkness
2.1: trimethylaluminum / tetrahydrofuran; toluene / 0.5 h / 0 - 20 °C
2.2: 17 h / -15 - 20 °C
3.1: 1H-imidazole / N,N-dimethyl-formamide / 1 h / 0 °C
4.1: diisobutylaluminium hydride / tetrahydrofuran; toluene / 0.5 h / -80 - -78 °C / Inert atmosphere
5.1: titanium(IV) tetraethanolate / tetrahydrofuran / 15 h / 20 °C / Inert atmosphere
6.1: N,N,N,N,-tetramethylethylenediamine; sec.-butyllithium / diethyl ether; hexane; cyclohexane / 1 h / -80 °C / Inert atmosphere
6.2: 0.33 h / -80 °C / Inert atmosphere
6.3: 1 h / -80 °C / Inert atmosphere
7.1: potassium carbonate / methanol / 2 h / 0 °C
8.1: Schwartz's reagent / tetrahydrofuran / 1 h / 0 - 20 °C / Inert atmosphere
With
1H-imidazole; titanium(IV) tetraethanolate; calcium sulfate; Schwartz's reagent; N,N,N,N,-tetramethylethylenediamine; trimethylaluminum; sec.-butyllithium; diisobutylaluminium hydride; potassium carbonate; silver(l) oxide;
In
tetrahydrofuran; methanol; diethyl ether; hexane; cyclohexane; N,N-dimethyl-formamide; toluene; acetonitrile;
DOI:10.1021/ol202747p