Diisopropylethylamine → N-(5-(4-acetylpiperazin-1-yl)pyridin-2-yl)-2-(4-(2-(difluoromethyl)pyridin-4-yl)phenyl)acetamide

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Reaction Steps

A mixture of 2-(4-(2-(difluoromethyl)pyridin-4-yl)phenyl)acetic acid 203-5 (30 mg, 0.11 mmol), 1-(4-(6-aminopyridin-3-yl)piperazin-1-yl)ethanone 111-4 (28 mg, 0.13 mmol), N,N-diisopropylethylamine (99 μL, 0.57 mmol) and O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluroniumhexafluorophosphate (65 mg, 0.17 mmol) in DMF (2 mL) was stirred at room temperature for 3 hours. The solvent was removed by rotary evaporation. The crude product was purified by reverse phase HPLC to give 2 N-(5-(4-acetylpiperazin-1-yl)pyridin-2-yl)-2-(4-(2-(difluoromethyl)pyridin-4-yl)phenyl)acetamide 201. MS m/z 418.2 (M+1); 1H NMR 400 MHz (MeOD) δ 8.61(d, 1H), 8.25(d, 1H), 7.91(d, 1H), 7.80-7.72(m, 4H), 7.49(d, 2H), 6.79(d, 1H), 6.73(t, 1H), 3.70(s, 2H), 3.66-3.58(m, 4H), 3.52-3.47(m, 2H), 3.45-3.40(m, 2H), 2.09(s, 3H).

Provenance & Evidence