sodium carbonate; tetrakis(triphenylphosphine) palladium(0) in ethylene glycol dimethyl ether; ethanol; water

1: 4-trifluoromethyl-1-iodobenzene With tert.-butyl lithium in tetrahydrofuran T=-78°C; 1 h; 2: With zinc dibromide in tetrahydrofuran T=20°C; 0.5 h; 3: 1-bromo-2-iodo-benzene With triphenylphosphine; [Pd(dibenzylideneacetone)2] in tetrahydrofuran T=20°C;

1: 4-trifluoromethylphenylbromobenzene With tert.-butyl lithium in tetrahydrofuran T=-78°C; 0.5 h; 2: N,N-dimethyl-formamide in tetrahydrofuran T=-78 - 20°C;