1: 56 percent / sodium carbonate / CH2Cl2 / 72 h 2: 90 percent / dpephos; sodium tert-butoxide / Pd2(dba)3 / toluene / 16 h / 100 °C View Scheme

tris-(dibenzylideneacetone)dipalladium(0); 9,9-dimethyl-4,5-bis(diphenyl-phosphino)xanthene; sodium t-butanolate in 1,4-dioxane T=100°C; 24 h; Inert atmosphere;