To a suspension of ethyl 3-amino-4,4-dimethylhexanoate, 27a, (0.19 g. 1.00 mmol) and 5-fluoro-3-(5-fluoro-4-methylsulfinyl-pyrimidin-2-yl)-1-(p- olylsulfonyl)pyrrolo[2,3-b]pyridine, 25a, (0.54 g, 1.20 mmol) in THF (14.4 mL) was added N,N-diisopropylethylamine (0.26 mL, 1.50 mmol). The mixture was refluxed at 80° C. overnight. After removing the solvents under reduced pressure, the crude product was purified by silica gel chromatography (0-50% EtOAc/Hexane gradient) to afford 155 mg of the desired product as a light yellow solid: 1H NMR (300 MHz, CDCl3) δ 8.61 (dd, J=9.0, 2.9 Hz, 1H), 8.56 (s, 1H), 8.33 (dd, J=2.7, 1.0 Hz, 1H), 8.11 (d, J=8.4 Hz, 2H), 7.30 (d, J=8.2 Hz, 2H), 5.19 (dd, J=10.1, 2.2 Hz, 1H), 4.94 (td, J=10.0, 3.7 Hz, 1H), 3.99 (dt, J=13.7, 6.8 Hz, 2H), 2.40 (s, 3H), 1.42 (dt, J=14.1, 6.9 Hz, 2H), 1.05 (t, J=7.1 Hz, 3H), 1.01-0.94 (m, 8H); 19F NMR (282 MHz, CDCl3) δ −130.39-133.75 (dd, J=9.0, 1.1 Hz, 1F), −158.56 (s, 1F); LCMS Gradient 10-90%, 0.1% formic acid, 5 minutes, C18/ACN, RT=4.18 minutes (M+H) 572.07.
