1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione in dimethyl sulfoxide T=20°C; Inert atmosphere;

1: hydrazine hydrate; calcium chloride; potassium hydroxide / diethylene glycol / 4 h / 150 - 170 °C 2: sulfuric acid / 80 °C 3: diisobutylaluminium hydride / water; dichloromethane; toluene / 1 h / -78 - 20 °C View Scheme

1.1: AlCl3, aluminium chloride / dichloromethane / 20 °C / |Inert atmosphere 2.1: zinc; hydrogenchloride / water / |Inert atmosphere; |Reflux 2.2: 20 °C / |Inert atmosphere 3.1: 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione / dimethyl sulfoxide / 20 °C / |Inert atmosphere View Scheme

diisobutylaluminium hydride in dichloromethane; water; toluene T=-78 - 20°C; 1 h;

1: sulfuric acid / 80 °C 2: diisobutylaluminium hydride / water; dichloromethane; toluene / 1 h / -78 - 20 °C View Scheme