1: water; hydrogenchloride / ethanol / 5 h / 80 °C / |Inert atmosphere 2: sodium nitrite; NH4BF4 / ethanol / 0.5 h / 0 °C / |Inert atmosphere 3: sodium acetate; palladium diacetate / methanol / 16 h / 20 °C / |Inert atmosphere 4: 1,8-diazabicyclo[5.4.0]undec-7-ene / 16 h / 0 - 20 °C / |Inert atmosphere 5: palladium 10 on activated carbon; hydrogen / #tert!-butyl alcohol; water / 5 h / 60 °C / 7500.75 Torr / |Autoclave; |Inert atmosphere View Scheme

hydrogenchloride; water in ethanol T=80°C; 5 h; Inert atmosphere;

Multi-step reaction with 4 steps 1: water; hydrogenchloride / ethanol / 5 h / 80 °C / |Inert atmosphere2: sodium nitrite; NH4BF4 / ethanol / 0.5 h / 0 °C / |Inert atmosphere3: sodium acetate; palladium diacetate / methanol / 16 h / 20 °C / |Inert atmosphere4: 1,8-diazabicyclo[5.4.0]undec-7-ene / 16 h / 0 - 20 °C / |Inert atmosphere