dioxochloro(trimethylsiloxy)chromate(VI) in 1,2-dichloro-ethane T=15°C; 4.5 h;

1: dichloro(1,1'-bis(diphenylphosphanyl)ferrocene)palladium(II) dichloromethane adduct; sodium carbonate / ethylene glycol dimethyl ether; water / 18 h / 80 °C / Inert atmosphere 2: toluene-4-sulfonic acid / methanol / 5 h / 20 °C 3: potassium carbonate / acetone / 20 °C / Inert atmosphere 4: diethylaluminium chloride / hexane / 2 h / 20 °C / Inert atmosphere 5: boron tribromide / dichloromethane / 0.42 h / 20 °C / Inert atmosphere 6: palladium 10 on activated carbon; hydrogen / methanol / 2 h / 20 °C / 3102.97 Torr / Inert atmosphere View Scheme