反应详情

A mixture of tert-butyl 2-(3-cyano-4-(2-fluoropyridin-4-yl)phenyl)acetate 206-5 (35 mg, 0.11 mmol) and TFA (0.5 mL) in DCM (3 mL) was stirred at room temperature for 5 hours. The solvents were evaporated to dryness under high vacuum. The crude product, 2-(3-cyano-4-(2-fluoropyridin-4-yl)phenyl)acetic acid 206-6, was dissolved in DMF (2 mL). 5-(pyrazin-2-yl)pyridin-2-amine (23 mg, 0.13 mmol) and DIEA (98 uL, 0.56 mmol) were added to the solution before O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluroniumhexafluorophosphate (64 mg, 0.17 mmol). The mixture was stirred at room temperature overnight. The mixture was stirred at room temperature overnight. The solvent was removed by rotary evaporation. The crude product was purified by reverse phase HPLC to give N-(5-(4-acetylpiperazin-1-yl)pyridin-2-yl)-2-(3-cyano-4-(2-fluoropyridin-4-yl)phenyl)acetamide 206. MS m/z 411.2 (M+1); 1H NMR 400 MHz (MeOD) δ 9.09 (s, 1H), 9.01 (s, 1H), 8.66 (dd, 1H), 8.52 (d, 1H), 8.42 (dd, 1H), 8.32 (d, 1H), 8.25 (d, 1H), 7.92 (d, 1H), 7.81 (dd, 1H), 7.64 (d, 1H), 7.52 (dt, 1H), 7.28 (s, 1H), 3.93 (s, 2H).

1. customThe solvents were evaporated to dryness under high vacuum
2. dissolutionThe crude product, 2-(3-cyano-4-(2-fluoropyridin-4-yl)phenyl)acetic acid 206-6, was dissolved in DMF (2 mL)
3. stirringThe mixture was stirred at room temperature overnight
4. stirringThe mixture was stirred at room temperature overnight
5. customThe solvent was removed by rotary evaporation
6. customThe crude product was purified by reverse phase HPLC