tris-(dibenzylideneacetone)dipalladium(0); tetrabutyl ammonium fluoride in tetrahydrofuran; water; N,N-dimethyl-formamide T=100°C; 1 h; Inert atmosphere;

palladium diacetate; caesium carbonate; 2,2,2-trimethylacetic acid in N,N-dimethyl-formamide T=100°C; 2 h; Inert atmosphere;

palladium diacetate; caesium carbonate; 2,2,2-trimethylacetic acid in N,N-dimethyl-formamide T=100°C; 2 h; Inert atmosphere;