1: sodium periodate; ruthenium trichloride; sodium hydrogencarbonate / tetrachloromethane; water; acetonitrile / 0.17 h / 0 °C / Inert atmosphere 2: diethyl ether; dichloromethane; benzene / 3 h / 0 - 20 °C / Inert atmosphere 3: sodium tetrahydroborate; nickel dichloride / methanol / 0.42 h / -5 °C / Inert atmosphere 4: 4-(N,N-dimethlyamino)pyridine / dichloromethane / 5 h / 0 - 20 °C / Inert atmosphere View Scheme

1: sodium periodate; ruthenium trichloride; sodium hydrogencarbonate / tetrachloromethane; water; acetonitrile / 0.17 h / 0 °C / Inert atmosphere 2: diethyl ether; dichloromethane; benzene / 3 h / 0 - 20 °C / Inert atmosphere 3: sodium tetrahydroborate; nickel dichloride / methanol / 0.42 h / -5 °C / Inert atmosphere View Scheme