1: With hydrogenchloride in methanol; water; isopropyl alcohol T=50°C; 1.5 h; 2: With sodium nitrite in methanol; water; isopropyl alcohol T=0 - 70°C; 1.25 h;

1: With hydrogenchloride in methanol; water; isopropyl alcohol T=50°C; 1.5 h; 2: With sodium nitrite in methanol; water; isopropyl alcohol T=0 - 20°C; 1 h; 3: With isopropyl alcohol in methanol; water T=70°C; 0.25 h;

Multi-step reaction with 3 steps 1.1: hydrogenchloride; sodium nitrite / water / 0.42 h / 0 °C / Inert atmosphere1.2: 0.27 h2.1: dichloromethane / 12 h / 0 - 20 °C / Inert atmosphere3.1: triethylamine / dichloromethane / 0 - 20 °C / Reflux