copper(l) iodide; tetrabutyl ammonium fluoride; triphenylphosphine; bis-triphenylphosphine-palladium(II) chloride; para-iodoanisole in N,N-dimethyl-formamide T=20°C; 12 h;

1: 5-Bromo-2-chloropyridine With n-butyllithium in tetrahydrofuran T=-78°C; 0.5 h; 2: chloro-trimethyl-silane in tetrahydrofuran