1: 2-bromo-pyridine With isopropylmagnesium chloride in tetrahydrofuran T=0 - 20°C; 3 h; 2: With zinc dibromide in tetrahydrofuran T=20°C; 2 h; 3: 4-bromoisophthalonitrile With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=50°C; 10 h;

[bis(acetoxy)iodo]benzene; FeI2 in N,N-dimethyl-formamide T=130°C; 15 h;

oxygen; copper diacetate in acetonitrile T=135°C; 48 h; Schlenk techniqueSealed tube;

copper(I) bromide in N,N-dimethyl-formamide T=130°C; 18 h;