thionyl chloride in N,N-dimethyl-formamide T=0 - 20°C; 14 h; Inert atmosphere;

1.1: nitric acid; sulfuric acid / water / 0.33 h / 5 - 90 °C 2.1: potassium hydroxide / ethanol / 1 h / |Reflux 3.1: potassium permanganate / water / 1.5 h / |Reflux 3.2: pH 1 4.1: sulfuric acid / 12 h / 0 °C / |Reflux 5.1: ammonia; ammonium chloride / water / 12 h / 20 °C 6.1: thionyl chloride / N,N-dimethyl-formamide / 14 h / 0 - 20 °C / |Inert atmosphere View Scheme

1.1: potassium hydroxide / ethanol / 1 h / |Reflux 2.1: potassium permanganate / water / 1.5 h / |Reflux 2.2: pH 1 3.1: sulfuric acid / 12 h / 0 °C / |Reflux 4.1: ammonia; ammonium chloride / water / 12 h / 20 °C 5.1: thionyl chloride / N,N-dimethyl-formamide / 14 h / 0 - 20 °C / |Inert atmosphere View Scheme

1: sulfuric acid / 12 h / 0 °C / |Reflux 2: ammonia; ammonium chloride / water / 12 h / 20 °C 3: thionyl chloride / N,N-dimethyl-formamide / 14 h / 0 - 20 °C / |Inert atmosphere View Scheme

1: ammonia; ammonium chloride / water / 12 h / 20 °C 2: thionyl chloride / N,N-dimethyl-formamide / 14 h / 0 - 20 °C / |Inert atmosphere View Scheme