piperidine in toluene 8 h; Heating;

1: 82 percent / CCl4 / 18 h / Ambient temperature 2: 81 percent / Na2CO3 / H2O 3: 98 percent / piperidine / toluene / 8 h / Heating View Scheme

1: 81 percent / Na2CO3 / H2O 2: 98 percent / piperidine / toluene / 8 h / Heating View Scheme

1: 50 percent / p-toluenesulfonic acid / toluene / Heating 2: 82 percent / CCl4 / 18 h / Ambient temperature 3: 81 percent / Na2CO3 / H2O 4: 98 percent / piperidine / toluene / 8 h / Heating View Scheme