1: pyridine / Ambient temperature 2: aq. NaIO4, RuCl3 / acetonitrile; CCl4 / 8 h / Ambient temperature 3: 10N aq. NaOH / ethanol / 0.5 h / Ambient temperature 5: 80 percent / LiAlH4 / diethyl ether / 4 h / Ambient temperature View Scheme