1: 89 percent / 4-dimethylaminopyridine, pyridine / 0.25 h / 0 °C 2: 92 percent / NaIO4, RuCl3*3H2O / CCl4; acetonitrile; H2O / 0.25 h / Ambient temperature 3: 86 percent / lithium naphthalene / tetrahydrofuran / -78 °C View Scheme