反应详情

A mixture of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-iodothieno[3,2-b]pyridine-6-carbonitrile (564 mg, 1.18 mmol), tributyl-(5-[1,3]dioxolan-2-yl-thiophen-3-yl)-stannane (680 mg, 1.52 mmol) and a pinch of bis(triphenylphosphine)palladium(II) chloride in 15 mL of dioxane is heated at reflux for 5 hours. Additional bis(triphenylphosphine)palladium(II) chloride is added and the reaction is heated at reflux overnight. Additional bis(triphenylphosphine)palladium(II) chloride and 10 mL of dioxane are added and the reaction is heated at reflux for 5 hours. The reaction mixture is concentrated in vacuo and partitioned between water and chloroform. The organic layer is dried over sodium sulfate, filtered and concentrated in vacuo. The residue is purified by flash column chromatography eluting with 1:1 hexane:ethyl acetate. The fractions containing product are combined and concentrated in vacuo to provide 447 mg of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-[5-(1,3-dioxolan-2-yl)thien-3-yl]thieno[3,2-b]pyridine-6-carbonitrile as white crystals, mp 219–221° C.; 1H NMR (DMSO-d6) δ 3.85 (s, 3H), 3.92–4.10 (m, 4H), 6.08 (s, 1H), 7.36 (s, 1H), 7.63 (s, 1H), 7.75 (s, 1H), 7.80 (s, 1H), 7.97 (s, 1H), 8.60 (s, 1H), 9.69 (s, 1H); MS 502.1 (M−H)−.

1. temperatureat reflux for 5 hours
2. temperaturethe reaction is heated
3. temperatureat reflux overnight
4. temperaturethe reaction is heated
5. temperatureat reflux for 5 hours
6. concentrationThe reaction mixture is concentrated in vacuo
7. custompartitioned between water and chloroform
8. dry with materialThe organic layer is dried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. customThe residue is purified by flash column chromatography
12. washeluting with 1:1 hexane
13. additionThe fractions containing product
14. concentrationconcentrated in vacuo