2,3-dicyano-5,6-dichloro-p-benzoquinone in 1,2-dichloro-ethane T=75°C; 2 h; Inert atmosphere;

1.1: hydrogenchloride; water / methanol / 20 h / 20 - 80 °C / Inert atmosphere 1.2: pH 7 - 8 2.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,2-dichloro-ethane / 2 h / 75 °C / Inert atmosphere View Scheme

1.1: triethylamine; ammonia / dichloromethane; 1,4-dioxane / 3 h / 20 °C / Inert atmosphere 2.1: hydrogenchloride; water / methanol / 20 h / 20 - 80 °C / Inert atmosphere 2.2: pH 7 - 8 3.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / 1,2-dichloro-ethane / 2 h / 75 °C / Inert atmosphere View Scheme