1: AgNO3, OsO4, / acetonitrile; 2-methyl-propan-2-ol / 24 h / Ambient temperature 2: ISi(CH3)3 / acetonitrile / 0.5 h / 0 °C 3: pyridine / 3 h / Ambient temperature 4: Zn, AcOH, / methanol / 2 h / 60 °C View Scheme

1: AgNO3, OsO4, / acetonitrile; 2-methyl-propan-2-ol / 24 h / Ambient temperature 2: 86 percent / Zn, AcOH, / methanol / 2 h / 60 °C View Scheme