1.1: potassium hydroxide; water / tetrahydrofuran; methanol / 15.5 h / 20 °C 1.2: pH 3 2.1: lithium aluminium tetrahydride / tetrahydrofuran / 4 h / 0 °C 3.1: manganese(IV) oxide / dichloromethane / 16 h View Scheme

1.1: iron / acetic acid / 18.5 h / 60 °C 2.1: potassium hydroxide; water / tetrahydrofuran; methanol / 15.5 h / 20 °C 2.2: pH 3 3.1: lithium aluminium tetrahydride / tetrahydrofuran / 4 h / 0 °C 4.1: manganese(IV) oxide / dichloromethane / 16 h View Scheme

1.1: potassium ethanolate / diethyl ether / 0.25 h 1.2: 21 h / 20 °C 2.1: iron / acetic acid / 18.5 h / 60 °C 3.1: potassium hydroxide; water / tetrahydrofuran; methanol / 15.5 h / 20 °C 3.2: pH 3 4.1: lithium aluminium tetrahydride / tetrahydrofuran / 4 h / 0 °C 5.1: manganese(IV) oxide / dichloromethane / 16 h View Scheme