1.1: sodium lauryl sulphate / acetone / 0.17 h 1.2: Rhodotorula rubra / H2O / 48 h / 30 °C / pH 7 / 200 rpm 2.1: 74.5 percent / K2CO3 / tetrahydrofuran / 2 h / Heating 3.1: N,O-bis(trimethylsilyl)acetamide / dimethylsulfoxide / 0.5 h / 20 °C 3.2: 70 percent / dimethylsulfoxide / 35 h / 85 °C 4.1: 65 percent / H2 / 10 percent Pd/C / ethanol / 12 h / 20 °C / 2585.74 Torr View Scheme

1: dioxane / 16 h / Ambient temperature 2: NaBH4 / ethanol / 0.5 h 3: H2, AcOH / 30percent Pd/C / 1.5 h View Scheme

sodium azide in methanol Heating;