反应详情

温度

70 °C

Methyl 5-[[2-fluoro-4,6-bis(trifluoromethyl)benzoyl]amino]pyridine-2-carboxylate (60 mg, 0.15 mmol), 2,4-dimethoxyphenol (24.80 mg, 0.16 mmol) and K2CO3 (60.66 mg, 0.44 mmol) were combined in DMF (0.4 mL) and heated at 70° C. Once the reaction was completed (by HPLC), aqueous 5 M NaOH (87.8 μL, 0.44 mmol) was added and the reaction was heated to 50° C. and monitored by HPLC until the reaction was complete. The reaction was cooled to 25° C., filtered and purified by reverse phase HPLC using a gradient of 1-99% ACN in Water and HCl as a modifier to yield 5-(2-(2,4-dimethoxyphenoxy)-4,6-bis(trifluoromethyl)benzamido)picolinic acid (49) (18 mg, 22%). ESI-MS m/z calc. 530.09. found 531.3 (M+1)+; Retention time: 1.54 minutes (3 minutes run). 1H NMR (400 MHz, DMSO-d6) δ 11.41 (s, 1H), 8.89 (d, J=2.5 Hz, 1H), 8.32 (dd, J=8.6, 2.5 Hz, 1H), 8.10 (d, J=8.5 Hz, 1H), 7.90 (s, 1H), 7.17 (d, J=8.8 Hz, 1H), 7.07 (s, 1H), 6.79 (d, J=2.8 Hz, 1H), 6.61 (dd, J=8.9, 2.8 Hz, 1H), 3.78 (d, J=14.3 Hz, 6H) ppm.

1. additionwas added
2. temperaturethe reaction was heated to 50° C.
3. temperatureThe reaction was cooled to 25° C.
4. filtrationfiltered
5. custompurified by reverse phase HPLC