1: 96 percent / 2,6-lutidine / CH2Cl2 2: 73 percent / NaN3 / dimethylformamide / 24 h / 40 °C 3: 80 percent / LiBH4 / diethyl ether / 0 °C 4: 80 percent / Ph3P / H2O; tetrahydrofuran 5: CH2Cl2 / 1 h / 0 °C 6: Bu4NF / tetrahydrofuran View Scheme