To (5-bromo-6-fluoro-pyridin-2-yl)-(5-fluoro-pyridin-3-ylmethyl)-carbamic acid tert-butyl ester (631, 0.600 g, 1.50 mmol, prepared as described in Example 60) in tetrahydrofuran (10.0 mL) at −25° C. under an atmosphere of nitrogen, was added a solution of isopropylmagnesium chloride (2.0 M in tetrahydrofuran, 0.730 mL). The reaction was allowed to warm to 5° C. over 1 hour. The reaction was cooled to −35° C., followed by addition of a solution of CuCN.2LiCl (0.65 M in tetrahydrofuran, 2.4 mL). After 5 minutes, 3-chloromethyl-5-cyano-pyrrolo[2,3-b]pyridine-1-carboxylic acid tert-butyl ester (635, 0.086 g, 0.29 mmol) in tetrahydrofuran (4.0 mL) was added to the reaction. The reaction was allowed to warm to room temperature over 1 hour, then poured into a diluted ammonia solution, and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 20% to 100% ethyl acetate in hexane to give the desired compound (636, 0.13 g, 92%). MS (ESI) [M+H+]+=477.4.
