potassium hydroxide; ethanol 1.5 h; Heating / reflux;

nitric acid; tin(IV) chloride in dichloromethane T=0°C; 2 h;

1: With tetra-(n-butyl)ammonium iodide; potassium carbonate T=130°C; 12 h; 2: With potassium hydroxide; water in tetrahydrofuran T=0 - 20°C; 20 h; 3: With hydrogenchloride; water in tetrahydrofuran pH=1;

potassium carbonate; butanone Erwaermen des Reaktionsprodukts mit aethanol. Kalilauge;