i-Pr2NPPh2; potassium carbonate; palladium diacetate in tetrahydrofuran T=65°C; Sonogashira coupling reaction; 8 h;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine in tetrahydrofuran T=50°C; 24 h; Inert atmosphere;

MoN(OSi(C6H5)3)3(C12H8N2); manganese (II) chloride in toluene T=100°C; Molecular sieveInert atmosphere;

potassium hydroxide; 18-crown-6 ether; copper(I) bromide in toluene T=20°C; Alkylation; 9 h;

1: HBr; H2O2; triethylbenzylammonium chloride / CCl4 / 1 h / 0 - 20 °C 2: 23 percent / KOH; K2CO3; 18-crown-6 / benzene / 20 h / 30 - 80 °C 3: 43 percent / KOH; CuBr; 18-crown-6 / toluene / 9 h / 20 °C View Scheme