1.1: sodium hydroxide / dichloromethane; water / 1 h / 40 °C 2.1: triethylamine / water / 2 h / 0 °C 3.1: acetonitrile / 12 h / |Reflux 4.1: sodium hydroxide / methanol; water / 4 h / |Reflux 4.2: 1 h / 20 °C 5.1: sodium hydroxide; sodium carbonate / dichloromethane; water / 1 h / 20 °C 5.2: 1 h / |Reflux View Scheme

1.1: sodium tetrahydroborate / methanol / 1 h / 20 °C 2.1: FeCl3·6H2O / dichloromethane / 24 h / |Reflux 3.1: sodium hydroxide / dichloromethane; water / 1 h / 40 °C 4.1: triethylamine / water / 2 h / 0 °C 5.1: acetonitrile / 12 h / |Reflux 6.1: sodium hydroxide / methanol; water / 4 h / |Reflux 6.2: 1 h / 20 °C 7.1: sodium hydroxide; sodium carbonate / dichloromethane; water / 1 h / 20 °C 7.2: 1 h / |Reflux View Scheme

1.1: sodium bis(2-methoxyethoxy)aluminium dihydride / toluene / 6 h / 5 - 40 °C / Cooling with ice 1.2: 20 - 60 °C 2.1: ethanol / 0 - 70 °C View Scheme