1: 0.67 g / NaBH4 / methanol; tetrahydrofuran / 1 h / Ambient temperature 2: 0.61 g / NaOH / H2O; methanol / 4 h / Heating 3: benzenesulfonyl chlorid / pyridine / 0.25 h / 0 °C View Scheme

1: 0.67 g / NaBH4 / methanol; tetrahydrofuran / 1 h / Ambient temperature 2: 0.61 g / NaOH / H2O; methanol / 4 h / Heating 3: benzenesulfonyl chlorid / pyridine / 0.25 h / 0 °C 4: pyridinium p-toluenesulfonate / ethanol / 4 h / 55 °C 5: 26 percent / triphenylphosphine, diethyl azodicarboxylate / tetrahydrofuran / Ambient temperature View Scheme

Multi-step reaction with 2 steps 1: 0.67 g / NaBH4 / methanol; tetrahydrofuran / 1 h / Ambient temperature2: 0.61 g / NaOH / H2O; methanol / 4 h / Heating  

With  sodium tetrahydroborate in  tetrahydrofuran; methanol 1 h;  Ambient temperature;