cesium fluoride; copper(l) iodide; tetrakis(triphenylphosphine) palladium(0) in 1,4-dioxane T=60°C; Suzuki-Miyaura cross-coupling; 5 h;

potassium phosphate; tetrakis(triphenylphosphine) palladium(0) in N,N-dimethyl-formamide T=150°C; Suzuki cross-coupling; 0.5 h; microwave irradiation;

1.1: 2,2,6,6-tetramethylpiperidine; n-BuLi / tetrahydrofuran / 0.25 h / -80 °C 1.2: 75 percent / hexachloroethane / tetrahydrofuran / 0.5 h / -80 °C 2.1: 77 percent / K3PO4 / Pd(PPh3)4 / dimethylformamide / 0.5 h / 150 °C / microwave irradiation View Scheme