To 3-dibenzylamino-2,6-difluoro-benzaldehyde (53, 0.76 g, 2.3 mmol) in methanol (50 mL) were added 5-pyridin-3-yl-1H-pyrrolo[2,3-b]pyridine (89, 0.40 g, 2.1 mmol, prepared as described in Example 17) and potassium hydroxide (0.50 g, 8.9 mmol) under an atmosphere of nitrogen. The reaction was stirred at room temperature overnight. The reaction was poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 5% methanol in methylene chloride to provide the compound (54, 0.60 g, 50%). MS (ESI) [M+H+]+=533.2.
