tetrakis(triphenylphosphine) palladium(0); triethylamine in 1,4-dioxane T=80°C; 4 h; Inert atmosphereSchlenk technique;

1: tetrakis(triphenylphosphine) palladium(0); triethylamine / 1,4-dioxane / 4 h / 80 °C / |Inert atmosphere; |Schlenk technique 2: tetrakis(triphenylphosphine) palladium(0); triethylamine; caesium carbonate / 1,4-dioxane; methanol / 20 h / 100 °C / |Inert atmosphere; |Schlenk technique 3: potassium hydroxide / 1,4-dioxane; methanol / 3 h / 100 °C View Scheme

1: tetrakis(triphenylphosphine) palladium(0); triethylamine; caesium carbonate / 1,4-dioxane; methanol / 20 h / 100 °C / |Inert atmosphere; |Schlenk technique 2: potassium hydroxide / 1,4-dioxane; methanol / 3 h / 100 °C View Scheme

1.1: sodium carbonate / toluene / 0.25 h / |Inert atmosphere 1.2: 24 h / 110 °C 2.1: sodium hydroxide / ethanol; dimethyl sulfoxide; water / 1.67 h / 50 °C View Scheme