3-chloro-benzenecarboperoxoic acid in dichloromethane T=25°C; 4 h;

potassium carbonate; sodium iodide in butanone Heating;

potassium carbonate in acetonitrile T=70°C; 12 h; Inert atmosphereReflux;

sodium ethanolate 1.) ethanol, reflux, 4 h, 2.) reflux, 48 h; Yield given. Multistep reaction;

1: 91.2 percent / piperidine, glacial acetic acid / benzene / Heating 2: 2.) NaOH / 1.) water, ethanol, heating, 2 h, 2.) ethylene glycol, heating, 40 h 3: 1.) acetic anhydride, 2.) ammonia / 1.) heating, 6 h, 2.) ethyl acetate, 2 h 4: 1 h / 200 - 220 °C View Scheme