1: triphenylphosphine; diethylazodicarboxylate / toluene / 20 °C / Inert atmosphere 2: sodium methylate / methanol / 5 h / 20 °C 3: pyridine / 5 h / 20 °C 4: 96 h / 55 °C 5: 10 wt Pd(OH)2 on carbon; hydrogen / ethanol; chloroform / 20 h / 20 °C View Scheme

1: sodium methylate / methanol / 5 h / 20 °C 2: pyridine / 5 h / 20 °C 3: 96 h / 55 °C 4: 10 wt Pd(OH)2 on carbon; hydrogen / ethanol; chloroform / 20 h / 20 °C View Scheme

1: sodium tetrahydroborate / ethanol / 12 h / Inert atmosphere 2: pyridine / dichloromethane / 20 °C / Inert atmosphere 3: triphenylphosphine; diethylazodicarboxylate / toluene / 20 °C / Inert atmosphere 4: sodium methylate / methanol / 5 h / 20 °C 5: pyridine / 5 h / 20 °C 6: 96 h / 55 °C 7: 10 wt Pd(OH)2 on carbon; hydrogen / ethanol; chloroform / 20 h / 20 °C View Scheme