1.1: sodium periodate; water / ruthenium trichloride / acetonitrile / 5 h / 0 °C 2.1: N,N-dimethyl-formamide; water / 0.25 h 2.2: 0.17 h / 10 °C 2.3: 1 h / 0 °C 3.1: triphenylphosphine / tetrahydrofuran / 2 h / 50 °C 3.2: 10 h View Scheme