1: 94 percent / diethyl ether 2: 87 percent / aq. PhI(O2CCF3)2; pyridine / dimethylformamide View Scheme

1.1: water; sodium carbonate / 1,4-dioxane / 3 h / 0 - 20 °C / Inert atmosphere 2.1: 4-(N,N-dimethlyamino)pyridine / dichloromethane / 0 °C / Inert atmosphere 2.2: 0 - 20 °C / Inert atmosphere 3.1: diethylamine / methanol / 20 °C / Inert atmosphere View Scheme

1.1: 4-(N,N-dimethlyamino)pyridine / dichloromethane / 0 °C / Inert atmosphere 1.2: 0 - 20 °C / Inert atmosphere 2.1: diethylamine / methanol / 20 °C / Inert atmosphere View Scheme

1: CsOH; BnQN+Cl- / toluene / 40 h / -55 °C / Inert atmosphere 2: sodium periodate; ruthenium trichloride; sodium hydrogencarbonate / tetrachloromethane; water; acetonitrile / 0.17 h / 0 °C / Inert atmosphere 3: diethyl ether; dichloromethane; benzene / 3 h / 0 - 20 °C / Inert atmosphere 4: sodium tetrahydroborate; nickel dichloride / methanol / 0.42 h / -5 °C / Inert atmosphere View Scheme