1: pyridine / dichloromethane / 1.5 h / 0 - 20 °C 2: trichlorophosphate / acetonitrile / 1 h / |Reflux; |Inert atmosphere 3: [[(η6-p-cymene)((1S,2S)-N-p-toluenesulfonyl-1,2-diphenylethylenediamine)]Ru]; formic acid; triethylamine / N,N-dimethyl-formamide / 20 °C 4: water; sodium hydroxide / ethanol / 3 h / 20 °C 5: thionyl chloride / dichloromethane / 1.5 h / 0 - 20 °C 6: sodium hydrogencarbonate / dichloromethane / 1.5 h / 20 °C 7: hydrogenchloride / water; ethanol / 2 h / |Reflux View Scheme

1: pyridine / dichloromethane / 1.5 h / 0 - 20 °C 2: trichlorophosphate / acetonitrile / 1 h / |Reflux; |Inert atmosphere 3: [[(η6-p-cymene)((1S,2S)-N-p-toluenesulfonyl-1,2-diphenylethylenediamine)]Ru]; formic acid; triethylamine / N,N-dimethyl-formamide / 20 °C 4: water; sodium hydroxide / ethanol / 3 h / 20 °C 5: thionyl chloride / dichloromethane / 1.5 h / 0 - 20 °C 6: sodium hydrogencarbonate / dichloromethane / 1.5 h / 20 °C 7: hydrogenchloride / water; ethanol / 2 h / |Reflux View Scheme