1: triethylamine / dichloromethane / 17 h / -5 °C / Inert atmosphere 2: potassium hydroxide / Aliquatreg; 336 / toluene / 24 h / 20 °C 3: Oxonereg;; sodium hydrogencarbonate; water / RuCl3 monohydrate / acetonitrile / 24 h / 20 °C View Scheme

1: triethylamine / dichloromethane / 17 h / -5 °C / Inert atmosphere 2: Oxonereg;; sodium hydrogencarbonate / tetrabutyl-ammonium chloride / dichloromethane; water; acetone / 16 h / 0 - 20 °C 3: 1,4-diaza-bicyclo[2.2.2]octane / 1,4-dioxane / 24 h / 40 °C 4: acetic anhydride; dimethyl sulfoxide / 24 h / 20 °C View Scheme

1: triethylamine / dichloromethane / 17 h / -5 °C / Inert atmosphere 2: Oxonereg;; sodium hydrogencarbonate / tetrabutyl-ammonium chloride / dichloromethane; water; acetone / 16 h / 0 - 20 °C 3: 1,4-diaza-bicyclo[2.2.2]octane / 1,4-dioxane / 24 h / 40 °C View Scheme