1: With sulfuric acid in water 1.5 h; Heating / reflux; 2: With sodium hydroxide in dichloromethane; water pH=12;

sodium periodate; sulfuric acid; sodium iodide in water T=100°C; 1 h; Heating / reflux;

1: With N-iodo-succinimide in acetic acid T=70°C; 6 h; 2: With sodium hydrogencarbonate in water pH=~ 8;

1,4-diaza-bicyclo[2.2.2]octane; palladium diacetate in N,N-dimethyl-formamide T=100°C; 2.83333 h;

1.1: triethylamine / copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride / tetrahydrofuran / 1 h / 0 - 20 °C 2.1: potassium tert-butylate / tert-butyl alcohol / 1 h / 85 °C 3.1: AlCl3, aluminium chloride / dichloromethane / 0.83 h 3.2: 18 h View Scheme

copper(l) iodide; triethylamine; bis-triphenylphosphine-palladium(II) chloride in N,N-dimethyl-formamide T=50°C; 8 h;