1: potassium carbonate / acetone / 4 h / |Reflux 2: ethanol / 14 h / |Reflux 3: pyridine / dichloromethane / 1.5 h / 0 - 20 °C 4: trichlorophosphate / acetonitrile / 1 h / |Reflux; |Inert atmosphere 5: [[(η6-p-cymene)((1S,2S)-N-p-toluenesulfonyl-1,2-diphenylethylenediamine)]Ru]; formic acid; triethylamine / N,N-dimethyl-formamide / 20 °C 6: water; sodium hydroxide / ethanol / 3 h / 20 °C 7: thionyl chloride / dichloromethane / 1.5 h / 0 - 20 °C 8: sodium hydrogencarbonate / dichloromethane / 1.5 h / 20 °C View Scheme

1: potassium carbonate / acetone / 4 h / |Reflux 2: ethanol / 14 h / |Reflux 3: pyridine / dichloromethane / 1.5 h / 0 - 20 °C 4: trichlorophosphate / acetonitrile / 1 h / |Reflux; |Inert atmosphere 5: [[(η6-p-cymene)((1S,2S)-N-p-toluenesulfonyl-1,2-diphenylethylenediamine)]Ru]; formic acid; triethylamine / N,N-dimethyl-formamide / 20 °C 6: water; sodium hydroxide / ethanol / 3 h / 20 °C 7: thionyl chloride / dichloromethane / 1.5 h / 0 - 20 °C 8: sodium hydrogencarbonate / dichloromethane / 1.5 h / 20 °C View Scheme

1: potassium carbonate / acetone / 4 h / |Reflux 2: ethanol / 14 h / |Reflux 3: pyridine / dichloromethane / 1.5 h / 0 - 20 °C 4: trichlorophosphate / acetonitrile / 1 h / |Reflux; |Inert atmosphere 5: [[(η6-p-cymene)((1S,2S)-N-p-toluenesulfonyl-1,2-diphenylethylenediamine)]Ru]; formic acid; triethylamine / N,N-dimethyl-formamide / 20 °C 6: water; sodium hydroxide / ethanol / 3 h / 20 °C 7: thionyl chloride / dichloromethane / 1.5 h / 0 - 20 °C 8: sodium hydrogencarbonate / dichloromethane / 1.5 h / 20 °C 9: hydrogenchloride / water; ethanol / 2 h / |Reflux View Scheme

potassium carbonate in acetone 4 h; Reflux;

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