Diisopropylethylamine → (S)-6-(5-cyclopropyl-1H-pyrazol-3-ylamino)-5-fluoro-2-(1-(4-fluorophenyl)ethylamino)nicotinonitrile

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A portion of 2-chloro-6-(5-cyclopropyl-1H-pyrazol-3-ylamino)-5-fluoronicotinonitrile (Method 1; 0.8 g, 2.8 mmol) and (S)-1-(4-fluorophenyl)ethanamine (0.8 g, 5.6 mmol) were added to a solution of n-BuOH (4 ml) and DIEA (0.5 g, 3.7 mmol) in a sealed tube. The reaction was heated to 140° C. for 48 hrs, then cooled to 25° C. and concentrated. The resulting residue was purified by column chromatography (DCM-MeOH=50:1) to give the title compound (0.55 g, 50%). 1H NMR (400 MHz, CDCl3) δ 8.44 (br s, 1H), 7.37-7.33 (m, 2H), 7.27 (d, J=9.6 Hz, 1H), 7.07-7.03 (m, 2H), 6.11 (s, 1H), 5.24-5.20 (m, 2H), 1.87-1.83 (m, 1H), 1.60 (d, J=6.2 Hz, 3H), 1.01-0.98 (m, 2H), 0.79-0.65 (m, 2H). MS: Calcd.: 380. Found: [M+H]+ 381.

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