1: 4-bromo-2-(1-methylethyl)-1H-pyrrolo[2,3-b]pyridine With sodium hydride in tetrahydrofuran T=20°C; 0.833333 h; 2: With n-butyllithium in tetrahydrofuran; hexanes T=-78°C; 0.916667 h; 3: tri-isopropoxy-borane in tetrahydrofuran; hexanes T=20°C; 1.5833 h;