sodium hydrogencarbonate; tetrakis(triphenylphosphine) palladium(0) in 1,4-dioxane; water T=90°C; 10 h;

trifluorormethanesulfonic acid; toluene T=100°C; 3 h;

1: 90 percent / potassium tert-butoxide, quinoxaline / liquid ammonia / -38 °C / electrosynthesis: cathode - platinum grid, 10 cm2, 1024 mesh/cm2; anode - magnesium rod, h = 8 cm, Φ = 1 cm; constant current density 0,5 A dm2, KBr as supporting electrolyte 2: 80 percent / toluene, CF3SO3H / 3 h / 100 °C View Scheme