1: diethyl ether / Erhitzen des nach der Hydrolyse erhaltenen Reaktionsprodukts mit wss. Oxalsaeure 2: sulfur / 230 °C View Scheme

chromium(VI) oxide; sulfuric acid in acetone T=5 - 15°C; 0.5 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

phosphorus pentachloride nachfolgend Destillation unter vermindertem Druck;

2: 90 percent / lithium aluminum hydride / diethyl ether / 24 h / Ambient temperature 3: 90 percent / phosphorus tribromide / benzene 4: 90 percent / methanol / Heating 5: 85 percent / potassium hydroxide / H2O; ethane-1,2-diol / Heating 6: PCl5 / benzene / 0.5 h / Ambient temperature 7: 82 percent / SnCl4 / benzene / 1.) 0 deg C, 30 min; 2.) rt, 90 min View Scheme

1: 90 percent / methanol / Heating 2: 85 percent / potassium hydroxide / H2O; ethane-1,2-diol / Heating 3: PCl5 / benzene / 0.5 h / Ambient temperature 4: 82 percent / SnCl4 / benzene / 1.) 0 deg C, 30 min; 2.) rt, 90 min View Scheme

1: 90 percent / phosphorus tribromide / benzene 2: 90 percent / methanol / Heating 3: 85 percent / potassium hydroxide / H2O; ethane-1,2-diol / Heating 4: PCl5 / benzene / 0.5 h / Ambient temperature 5: 82 percent / SnCl4 / benzene / 1.) 0 deg C, 30 min; 2.) rt, 90 min View Scheme

1: 85 percent / potassium hydroxide / H2O; ethane-1,2-diol / Heating 2: PCl5 / benzene / 0.5 h / Ambient temperature 3: 82 percent / SnCl4 / benzene / 1.) 0 deg C, 30 min; 2.) rt, 90 min View Scheme

1: 90 percent / lithium aluminum hydride / diethyl ether / 24 h / Ambient temperature 2: 90 percent / phosphorus tribromide / benzene 3: 90 percent / methanol / Heating 4: 85 percent / potassium hydroxide / H2O; ethane-1,2-diol / Heating 5: PCl5 / benzene / 0.5 h / Ambient temperature 6: 82 percent / SnCl4 / benzene / 1.) 0 deg C, 30 min; 2.) rt, 90 min View Scheme

cobalt-oleate; manganese-oleate; oxygen T=60 - 80°C;

chromic acid; acetic acid