反应详情

To a solution of Example 18 (50 mg, 0.1 mmol) and NH4Cl (7 mg, 0.11 mmol) in DMF (4 mL) were added hydroxybenzotriazole (15 mg, 0.11 mmol) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (21 mg, 0.11 mmol) and the mixture was stirred at room temperature for 14 h (completion of reaction monitored by TLC). The mixture was diluted with water and extracted with CH2Cl2 (3×20 mL). The combined organic phase was washed with water and brine, dried over Na2SO4 and concentrated under reduced pressure. The crude material was purified by column chromatography (10% MeOH in CH2Cl2) to afford the title compound (Example 19). 1H-NMR (400 MHz, DMSO-d6): ∂ 13.0 (br s, 1H), 8.47 (d, J=7.2 Hz, 2H), 8.06-7.73 (m, 6H), 7.35 (s, 1H), 6.92-6.79 (m, 1H), 6.17-6.13 (m, 1H), 5.75-5.60 (m, 1H), 4.81-4.60 (m, 2H), 4.29-4.10 (m, 1H), 2.84-2.72 (m, 1H), 2.17-1.94 (m, 3H), 1.65 (s, 2H); MS calculated for C24H23F3N5O3 (M+H+) 486.17. found 486.3.

1. custom(completion of reaction monitored by TLC)
2. extractionextracted with CH2Cl2 (3×20 mL)
3. washThe combined organic phase was washed with water and brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated under reduced pressure
6. customThe crude material was purified by column chromatography (10% MeOH in CH2Cl2)