1: 7.23 g / potassium tert-butoxide / tetrahydrofuran / 3 h / 20 °C 2: 81 percent / PdCl2(PPh3)2 / ethanol / 32 h / 60 °C / 45600 Torr 3: 76 percent / NaHCO3; Oxone / acetone; H2O / 3 h / 20 °C 4: 95 percent / DBU / CH2Cl2 / 3 h / Heating 5: 43 percent / NMO; osmiun tetroxide / 2-methyl-propan-2-ol; H2O / 3 h / 20 °C 6: 70 percent / TFA / H2O / 10 h / 20 °C View Scheme