water; potassium hydroxide in methanol 48 h; Reflux;

1.1: sulfuric acid / |Reflux; |Molecular sieve 2.1: tin(ll) chloride / ethanol / 0.5 h / |Reflux 3.1: acetic acid; sodium nitrite / water 4.1: sodium hydroxide; water / ethanol / 4 h / 20 °C 5.1: thionyl chloride / 1 h / |Reflux 5.2: 0 °C 6.1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 7.1: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme

1.1: tin(ll) chloride / ethanol / 0.5 h / |Reflux 2.1: acetic acid; sodium nitrite / water 3.1: sodium hydroxide; water / ethanol / 4 h / 20 °C 4.1: thionyl chloride / 1 h / |Reflux 4.2: 0 °C 5.1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 6.1: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme

1.1: acetic acid; sodium nitrite / water 2.1: sodium hydroxide; water / ethanol / 4 h / 20 °C 3.1: thionyl chloride / 1 h / |Reflux 3.2: 0 °C 4.1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 5.1: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme

1.1: sodium hydroxide; water / ethanol / 4 h / 20 °C 2.1: thionyl chloride / 1 h / |Reflux 2.2: 0 °C 3.1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 4.1: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme

1.1: thionyl chloride / 1 h / |Reflux 1.2: 0 °C 2.1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 3.1: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme

1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 2: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme

1.1: 1,3-dibromo-5,5-dimethyl-hydantoin; sulfuric acid 2.1: sulfuric acid / |Reflux; |Molecular sieve 3.1: tin(ll) chloride / ethanol / 0.5 h / |Reflux 4.1: acetic acid; sodium nitrite / water 5.1: sodium hydroxide; water / ethanol / 4 h / 20 °C 6.1: thionyl chloride / 1 h / |Reflux 6.2: 0 °C 7.1: potassium hydroxide; [bis(acetoxy)iodo]benzene / 3 h / 0 °C 8.1: water; potassium hydroxide / methanol / 48 h / |Reflux View Scheme