1: Pd2(PPh3)2Cl2; sodium sulphide * 5H2O; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 2: hydrogenchloride / water / 1.5 h / 100 °C 3: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 4: sulfuric acid / 1.5 h / 100 °C View Scheme

1: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 2: hydrogenchloride / water / 1.5 h / 100 °C 3: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 4: sulfuric acid / 1.5 h / 100 °C View Scheme

1: hydrogenchloride / water / 1.5 h / 100 °C 2: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 3: sulfuric acid / 1.5 h / 100 °C View Scheme

1: Pd2(PPh3)2Cl2; sodium sulphide * 5H2O; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 2: sulfuric acid / 1.5 h / 100 °C View Scheme

1: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 2: sulfuric acid / 1.5 h / 100 °C View Scheme

1: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 2: hydrogenchloride / water / 1.5 h / 100 °C 3: Pd2(PPh3)2Cl2; 1,8-diazabicyclo[5.4.0]undec-7-ene; 1,4-di(diphenylphosphino)-butane / dimethyl sulfoxide / 12 h / 50 °C 4: sulfuric acid / 1.5 h / 100 °C View Scheme

phosphorus pentachloride; benzene Erwaermen des Reaktionsprodukts mit verd. Alkohol;

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