1: 97 percent / tetrahydrofuran / 16 h / -78 - 20 °C 2: 82 percent / 2,6-lutidine / 16 h / Ambient temperature 3: 42 percent / PhMe2CCH=Mo=N<2,6-(i-Pr)2C6H3><OCMe(CF3)2>2 / benzene / 16 h / Ambient temperature 4: 92 percent / Bu4N(1+)*F(1-) / tetrahydrofuran / 16 h / -20 - 0 °C 5: 55 percent / OsO4, Et3BuN(1+)*Cl(1-) / 2-methyl-propan-2-ol; CHCl3; H2O / 16 h / 50 °C 6: 50 percent / Na, NH3 (liq.) / 7 h / -78 °C View Scheme