caesium carbonate; 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; tris-(dibenzylideneacetone)dipalladium(0) in 1,4-dioxane T=100°C;

1: hydrobromic acid / Heating 2: Et3N 3: 80 percent / 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene; cesium carbonate / tris(dibenzylideneacetone)palladium(0) / dioxane / 100 °C View Scheme

1: Et3N 2: 80 percent / 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene; cesium carbonate / tris(dibenzylideneacetone)palladium(0) / dioxane / 100 °C View Scheme