反应详情

A mixture of 2,4-dichloro-5-methoxyaniline (380 mg, 2.0 mmol) and 60% sodium hydride (80 mg, 2.0 mmol) in 20 mL of tetrahydrofuran is heated at reflux for 1 hour. The solution is cooled and 7-chloro-2-iodothieno[3,2-b]pyridine-6-carbonitrile (320 mg, 1.0 mmol) is added and the reaction mixture is heated at reflux overnight. The reaction mixture is cooled to room temperature and partitioned between ethyl acetate and water. The organic layer is washed with water, dried over magnesium sulfate, filtered and concentrated in vacuo. The residue is purified by flash column chromatography eluting with 2% methanol in chloroform to provide 240 mg of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-iodothieno[3,2-b]pyridine-6-carbonitrile as yellow crystals, mp 233-234° C.; 1H NMR (DMSO-d6) δ 3.85 (s, 3H), 7.38 (s, 1H), 7.77 (s, 1H), 7.79 (s, 1H), 8.56 (s, 1H), 9.74 (s, 1H); MS 475.9 (M+H)+.

1. temperatureis heated
2. temperatureat reflux for 1 hour
3. temperatureThe solution is cooled
4. temperaturethe reaction mixture is heated
5. temperatureat reflux overnight
6. custompartitioned between ethyl acetate and water
7. washThe organic layer is washed with water
8. dry with materialdried over magnesium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. customThe residue is purified by flash column chromatography
12. washeluting with 2% methanol in chloroform