N,N-dimethyl-aniline; trichlorophosphate 2 h; Heating;

1: 43 percent / piperidine / ethanol / 24 h / Heating 2: 89 percent / POCl3; N,N-dimethylaniline / 2 h / Heating View Scheme

1.1: triethylamine / tetrahydrofuran / 0.5 h / 20 °C 2.1: trifluoroacetic acid / 0.17 h / 110 °C / |Microwave irradiation 2.2: 4 h / |Reflux 3.1: acetic acid; ammonium cerium (IV) nitrate / water / 0.08 h / 20 °C 4.1: triethylamine; trichlorophosphate / 3 h / |Reflux View Scheme

1: acetic acid; ammonium cerium (IV) nitrate / water / 0.08 h / 20 °C 2: triethylamine; trichlorophosphate / 3 h / |Reflux View Scheme