hydrogenchloride in methanol; water 0.5 h; Heating;

dirhodium tetraacetate in dichloromethane 1 h; Heating;

1.1: 65 percent / Na / methanol; acetone / 2 h / Heating 2.1: fuming sulfuric acid / 72 h / 20 °C 2.2: 80 percent / aq. HClO4 3.1: 93 percent / hydrazine hydrate / acetonitrile / Heating View Scheme