反应详情

温度

90 °C

4-(5-Chloro-2-fluoropyridin-4-yl)-benzoic acid methyl ester (90 mg, 0.34 mmol) was dissolved in DMSO in a screw cap tube and 0.5 mL isopropylamine was added. The tube was sealed and heated to 90° C. for 2 days. The reaction mixture was diluted with water and extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate and concentrated to an oil, which was purified by chromatography on silica (EtOAc 0 to 20%/hexanes) to give 70 mg of 4-(5-chloro-2-isopropylamino-pyridin-4-yl)-benzoic acid methyl ester, 0.23 mmol, 67% yield. 1H NMR 500 MHz (CDCl3): 8.08 (m, 3H), 7.45 (d, 2H), 6.22 (s, 1H), 4.37 (d, 1H), 3.88 (s, 3H), 3.80 (m, 1H), 1.17 (d, 6H).

1. customcap tube
2. customThe tube was sealed
3. extractionextracted with ethyl acetate
4. washThe organic layer was washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated to an oil, which
7. customwas purified by chromatography on silica (EtOAc 0 to 20%/hexanes)