1.1: tris(triphenylphosphine)ruthenium(II) chloride; C48H50N2O2P2Ru; potassium tert-butylate; hydrogen / isopropyl alcohol / 24 h / 0 °C / 7600.51 Torr / Reflux; Autoclave 2.1: 4-(N,N-dimethlyamino)pyridine; triethylamine / dichloromethane / 0.33 h / 20 °C 2.2: 0.25 h / 20 °C 3.1: 4-(N,N-dimethlyamino)pyridine; triethylamine; zinc / 2 h / 20 °C 4.1: ammonium cerium (IV) nitrate / acetonitrile / 0.17 h / 20 °C 4.2: 6 h View Scheme