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

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

1: 78 percent / caesium carbonate / Pd2(dba)3; Xantphos / dioxane / 24 h / 80 °C 2: 71 percent / phosphorus pentasulfide; hexamethyldisiloxane / toluene / 21 h / 90 °C View Scheme

1: 78 percent / caesium carbonate / Pd2(dba)3; Xantphos / dioxane / 24 h / 80 °C 2: 71 percent / phosphorus pentasulfide; hexamethyldisiloxane / toluene / 21 h / 90 °C View Scheme