(5-Bromo-pyridin-2-yl)-(2,4-difluoro-phenyl)-amine (100 mg; 0.35 mmol) in THF (2.2 ml) is treated at −78 C with nBuLi (0.48 ml of a 1.5M solution in hexane; 0.77 mmol). After 10 min at −78 C, 5-bromo-2-methoxybenzaldehyde (75 mg; 0.35 mmol) in THF (0.3 ml) is added and stirring continued for 30 min. at −78 C. The reaction mixture is poured on water/ice and extracted three times with ethyl acetate. The combined organic phases are dried over Na2SO4 and evaporated to dryness. Purification via chromatography (SiO2; TBME/hexanes 3/7) yields the title compound (60 mg; 40%)
