2,4,6-trichloro-1,3,5-triazine; triethylamine in acetone 6 h; Ambient temperature;

1: oxalyl dichloride / toluene / 4 h / |Reflux; |Inert atmosphere 2: triethylamine / dichloromethane / 72 h / |Reflux; |Inert atmosphere 3: RuCl2(tricyclohexylphosphine)2(benzylidene) / dichloromethane / 16 h / 40 °C / |Inert atmosphere 4: palladium on activated charcoal; hydrogen / ethanol / 2 h / 20 °C / |Inert atmosphere View Scheme

1: triethylamine / dichloromethane / 72 h / |Reflux; |Inert atmosphere 2: RuCl2(tricyclohexylphosphine)2(benzylidene) / dichloromethane / 16 h / 40 °C / |Inert atmosphere 3: palladium on activated charcoal; hydrogen / ethanol / 2 h / 20 °C / |Inert atmosphere View Scheme

1.1: potassium hydroxide / ethanol / 2 h / |Reflux 1.2: 0 - 20 °C / |Inert atmosphere 2.1: triethylamine / dichloromethane / 0 - 20 °C / |Inert atmosphere 3.1: MgBr2(Et2O) / diethyl ether / 2 h / 20 °C 4.1: sodium hydroxide; para-dicyanobenzene; phenanthrene / acetonitrile; water / 6 h / 20 °C / |Inert atmosphere; |UV-irradiation View Scheme

benzenesulfonic Acid; benzene

aluminum oxide; chlorine; 1,8-diazabicyclo[5.4.0]undec-7-ene 1.) irradiation, 20 deg C, 2 h, 2.) DMF, reflux, 8 h; Multistep reaction. Title compound not separated from byproducts;

Abscheidung des Reaktionswassers durch azeotrope Destillation;