1: OsO4, N-morpholine N-oxide monohydrate / dimethylformamide; 2-methyl-propan-2-ol / 4.5 h / -20 °C 2: TsOH / acetone / 2 h / Ambient temperature 3: 82 percent / LiAlH4 / tetrahydrofuran / 1 h / Ambient temperature View Scheme