1: caesium carbonate; dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine; palladium diacetate / toluene / 110 °C / |Inert atmosphere 2: caesium carbonate; dicyclohexyl(2′,6′-dimethoxybiphenyl-2-yl)phosphine; palladium diacetate / toluene / 110 °C / |Inert atmosphere View Scheme

1: 8 h / 200 °C 2: 0.1 tetrapropylammoniun fluoroborate / dimethylformamide / 4 h / electrochemical reduction View Scheme