1: Ag2O / CHCl3 / 8 h / Ambient temperature 2: NaBH4 / CHCl3; methanol / 1 h / -40 °C 3: 81 percent / dimethylsulfoxide / 14 h / 160 °C 4: 82 percent / OsO4, NaIO4 / H2O; diethyl ether / 3 h / Ambient temperature 5: 89 percent View Scheme

1: NaBH4 / CHCl3; methanol / 1 h / -40 °C 2: 81 percent / dimethylsulfoxide / 14 h / 160 °C 3: 82 percent / OsO4, NaIO4 / H2O; diethyl ether / 3 h / Ambient temperature 4: 89 percent View Scheme

1: 82 percent / OsO4, NaIO4 / H2O; diethyl ether / 3 h / Ambient temperature 2: 89 percent View Scheme

1: 81 percent / dimethylsulfoxide / 14 h / 160 °C 2: 82 percent / OsO4, NaIO4 / H2O; diethyl ether / 3 h / Ambient temperature 3: 89 percent View Scheme

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