Dimethyl Sulfoxide → N-(5-(4-acetylpiperazin-1-yl)pyridin-2-yl)-2-(3-methyl-4-(2-methylpyridin-4-yl)phenyl)acetamide

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To the mixture of N-(5-(4-acetylpiperazin-1-yl)pyridin-2-yl)-2-(4-bromo-3-methylphenyl)acetamide 159-1 (65 mg, 0.15 mmol) and 2-methyl-4-(tributylstannyl)pyridine 159-2 (58 mg, 0.15 mmol) in DMF (0.8 mL) was added [1,1′-Bis(diphenylphosphino)ferrocene]dichloropalladium(II) (30 mg, 0.036 mmol). The reaction was stirred at 110° C. for 20 hours. After cooling down to room temperature, the reaction mixture was diluted into DMSO and purified by reverse-phase HPLC to give N-(5-(4-acetylpiperazin-1-yl)pyridin-2-yl)-2-(3-methyl-4-(2-methylpyridin-4-yl)phenyl)acetamide 159 as off-white solid. MS m/z 444.2 (M+1); 1H NMR 400 MHz (DMSO-d6) δ10.47 (s, 1H), 8.41 (d, 1H), 7.97 (d, 1H), 7.88 (d, 1H), 7.37 (dd, 1H), 7.21-7.18 (m, 2H), 7.16 (s, 1H), 7.12-7.09 (m, 2H), 3.61 (s, 2H), 3.52 (m, 4H), 3.08 (t, 2H), 3.02 (t, 2H), 2.17 (s, 3H), 1.97 (s, 3H).

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