iron in acetic acid T=60°C; 18.5 h;

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