cesium fluoride in acetonitrile T=20°C; 24 h;

1: potassium carbonate; copper powder; nitrobenzene 2: phosphorus pentachloride; benzene / Behandeln des Chlorids mit Aluminiumchlorid View Scheme

1: trifluorormethanesulfonic acid / 1,2-dichloro-ethane / 0 - 20 °C 2: cesium fluoride / acetonitrile / 24 h / 20 °C View Scheme

1: sodium t-butanolate / N,N-dimethyl-formamide / 0 - 20 °C 2: trifluorormethanesulfonic acid / 1,2-dichloro-ethane / 0 - 20 °C 3: cesium fluoride / acetonitrile / 24 h / 20 °C View Scheme

1: potassium carbonate / dichloromethane / 0 - 20 °C 2: sodium t-butanolate / N,N-dimethyl-formamide / 0 - 20 °C 3: trifluorormethanesulfonic acid / 1,2-dichloro-ethane / 0 - 20 °C 4: cesium fluoride / acetonitrile / 24 h / 20 °C View Scheme