1.1: sodium hydride / dimethylformamide / 3 h / 0 °C 1.2: 87 percent / dimethylformamide / 20 °C 2.1: 79 percent / xantphos; cesium carbonate / Pd2(dba)3 / dioxane / 24 h / 115 °C / 9 3.1: KOH / H2O; ethanol / 2 h / Heating View Scheme

1: 71 percent / phosphorus pentasulfide; hexamethyldisiloxane / toluene / 21 h / 90 °C 2: 74 percent / caesium carbonate / Pd2(dba)3; DPEphos / toluene / 20 h / 100 °C View Scheme

1.1: sodium hydride / dimethylformamide / 3 h / 0 °C 1.2: 87 percent / dimethylformamide / 20 °C 2.1: 70 percent / dpephos; cesium carbonate / Pd2(dba)3 / toluene / 24 h / 100 °C View Scheme

tris(dibenzylideneacetone)dipalladium (0); caesium carbonate; bis[2-(diphenylphosphino)phenyl] ether in toluene T=100°C; 20 h;

1.1: sodium hydride / dimethylformamide / 3 h / 0 °C 1.2: 87 percent / dimethylformamide / 20 °C 2.1: 66 percent / xantphos; cesium carbonate / Pd2(dba)3 / dioxane / 26 h / 115 °C / 9 View Scheme

diphosphorus pentasulfide; bis-trimethylsilyl ether in toluene T=90°C; 21 h;