in toluene

hydrogenchloride 3 h; Heating;

1: 73.5 percent / benzene / 0.5 h / Heating 2: 50 percent / 10percent HCl / 3 h / Heating View Scheme

1: N-[2-(ethylamino)ethyl]amine; N-ethyl-ethylenediamine; dihydrochloride in water 0.0833333 h; 2: N-Benzoyl-imidazole With sodium chloride in water 0.5 h; 3: With sodium hydroxide in water chemoselective reaction;

1.1: 0.08 h / 20 °C / Neat (no solvent) 2.1: water / 0.08 h 2.2: 0.5 h View Scheme