potassium tert-butylate; sodium hydride in DMF (N,N-dimethyl-formamide) T=0 - 20°C; 26 h;

1: meta-dibromobenzene With bis(η4-1,5-cyclooctadiene)-di-μ-methoxy-diiridium(I); 4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl-4',4',5',5'-tetramethyl-1,3,2-dioxaborolane; 4,4'-di-tert-butyl-2,2'-dipyridyl in tetrahydrofuran T=80°C; 24 h; Inert atmosphere; 2: bis-(4-methoxyphenyl)-disulfide With [2,2']bipyridinyl; copper(l) chloride in water; dimethyl sulfoxide T=80°C; 24 h; Inert atmosphere; regioselective reaction;