1: 3-bromo-4-chloro-1H-pyrrolo[2,3-b]pyridine With sodium hydride in tetrahydrofuran T=0°C; 0.666667 h; 2: benzenesulfonyl chloride in tetrahydrofuran T=20°C; 3 h;

tetrakis(triphenylphosphine) palladium(0) in 1,3-dimethyl-imidazolidin-2-one T=20 - 140°C; 1.5 h;