1: With sodium dithionite in 2-methoxy-ethanol; water T=100°C; 2.5 h; 2: With hydrogenchloride in 2-methoxy-ethanol; water 0.416667 h; Heating / reflux; 3: With sodium carbonate in 2-methoxy-ethanol; water T=20°C; pH=~ 7 - ~ 8;

sulfuric acid

1: acetic acid; bromine 2: aqueous hydrochloric acid View Scheme

hydrogen bromide Diazotization.Behandlung der Diazoniumsalz-Loesung mit CuBr in der Waerme;