iron; ammonium chloride in isopropyl alcohol T=80°C; 22 h;

1.1: 1,3-dibromo-5,5-dimethyl-hydantoin / dichloromethane / 0.5 h / -45 °C 1.2: -45 - 22 °C 2.1: sulfuric acid; nitric acid / -10 - 22 °C 3.1: sulfuric acid / 2 h / 22 °C 3.2: 22 °C 4.1: hydrogenchloride; tin(ll) chloride / water / 0 - 100 °C 5.1: 1 h / Erfllectrochemical reaction View Scheme

1.1: sulfuric acid; nitric acid / -10 - 22 °C 2.1: sulfuric acid / 2 h / 22 °C 2.2: 22 °C 3.1: hydrogenchloride; tin(ll) chloride / water / 0 - 100 °C 4.1: 1 h / Erfllectrochemical reaction View Scheme

1: hydrogenchloride; tin(ll) chloride / water / 0 - 100 °C 2: 1 h / Erfllectrochemical reaction View Scheme

1 h; Erfllectrochemical reaction;

platinum(IV) oxide; 10 palladium on activated carbon; hydrogen; sodium hydroxide in water P=2585.81 Torr; 0.5 h;