1: 0.61 g / NaOH / H2O; methanol / 4 h / Heating 2: benzenesulfonyl chlorid / pyridine / 0.25 h / 0 °C View Scheme

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

With  sodium hydroxide in  methanol; water 4 h;  Heating;   

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

Multi-step reaction with 2 steps 1: 94 percent / TsOH / CH2Cl2 / 0 degC, 30 min, room t., 1 h2: 0.67 g / NaBH4 / methanol; tetrahydrofuran / 1 h / Ambient temperature