nickel in ethanol 3 h; Heating;

1: 84 percent / Raney nickel / aq. ethanol / 3 h / Heating 2: 91 percent / diisopropylamine, n-butyllithium, hexamethylphosphoramide / tetrahydrofuran; hexane / 2 h / -78 °C 3: sodium metaperiodate / methanol; H2O / 18 h / Ambient temperature 4: CaCO3 / toluene / 1 h / Heating View Scheme