反应详情

温度

50 °C

A suspension of 4-chloro-3-(trifluoromethyl)aniline (20.14 mg, 0.103 mmol) in DMF (8 mL) was added to a solution of 2-(4-(5-ethoxy-6-oxo-1,6-dihydropyridin-3-yl)-2-fluorophenyl)acetic acid (30 mg, 0.103 mmol) in DMF (8 mL). HOBt (23.66 mg, 0.154 mmol), EDC (29.6 mg, 0.154 mmol) and Et3N (0.043 mL, 0.309 mmol) were added and the mixture was stirred at 50° C. for 8 h. Then the solution was concentrated and distributed between EA and saturated NaHCO3 solution. The combined organic extract was washed with brine, dried over MgSO4, filtered and concentrated. The crude material was purified by preparative HPLC (MeCN/H2O as eluants, acidic condition) to yield a white solid of N-(4-chloro-3-(trifluoro methyl)phenyl)-2-(4-(5-ethoxy-6-oxo-1,6-dihydropyridin-3-yl)-2-fluorophenyl)acetamide (11.39 mg, 0.024 mmol, 23.6% yield). TLC (DCM/MeOH=10:1, Rf=0.6): 1H NMR (400 MHz, CD3OD) δ: 8.10 (s, 1H), 7.79 (d, J=8.82 Hz, 1H), 7.53 (d, J=8.82 Hz, 1H), 7.37-7.44 (m, 1H), 7.26-7.37 (m, 3H), 7.23 (d, J=1.98 Hz, 1H), 4.12 (q, J=7.06 Hz, 2H), 3.80 (s, 2H), 1.46 (t, J=6.95 Hz, 3H); ES-LCMS m/z 469.1 (M+H).

1. concentrationThen the solution was concentrated
2. extractionThe combined organic extract
3. washwas washed with brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe crude material was purified by preparative HPLC (MeCN/H2O as eluants, acidic condition)