1: With hydrogenchloride in ethyl acetate T=20°C; 2: With benzophenone in ethyl acetate 3: With hydrogenchloride; methanol; sodium hydroxide; water more than 3 stages;

1: dimethylformamide / 0.17 h / Ambient temperature 2: K2CO3 / dimethylformamide / 1.5 h / Ambient temperature 3: Et3N, MeOH / 3.5 h / Heating 4: xylene / 2.5 h / Heating 5: K2CO3, KI / dimethylformamide / 70 - 80 °C 6: N,N-diethylaniline / Heating View Scheme

1: dimethylformamide / 0.17 h / Ambient temperature 2: K2CO3 / dimethylformamide / 1.5 h / Ambient temperature 3: Et3N, MeOH / 3.5 h / Heating 4: xylene / 2.5 h / Heating View Scheme

1: HCl gas / ethyl acetate / 48 h / -10 °C 2: 1.) KOH; 2.) 1M HCl / H2O; methanol / 3 h / Ambient temperature View Scheme

1: With hydrogenchloride in ethyl acetate T=20°C; 2: With benzophenone in ethyl acetate 3: With hydrogenchloride; methanol; sodium hydroxide; water more than 3 stages;