反应详情

A mixture of 4-chloro-8-(2-chloroethoxy)-7-methoxybenzo[b][1,8]naphthyridine-3-carbonitrile (500 mg, 1.43 mmol) and 2,4-dichloro-5-methoxyaniline (460 mg, 2.39 mmol) in 40 mL of 2-ethoxyethanol is heated at reflux for 20 minutes then cooled to room temperature. The solution is partitioned between ethyl acetate and saturated sodium bicarbonate. The organic layer is dried over magnesium sulfate, filtered and concentrated in vacuo. The residue is partitioned between ethyl acetate and an aqueous solution of sodium hydroxide and sodium bicarbonate (pH 14). The organic layer is dried over magnesium sulfate, filtered and concentrated in vacuo. Ethyl acetate and diethyl ether are added to the residue and the resultant orange solid is collected by filtration to provide 297 mg (41%) of 8-(2-chloroethoxy)-4-(2,4-dichloro-5-methoxyanilino)-7-methoxybenzo[b][1,8]naphthyridine-3-carbonitrile, mp 227–230° C. dec.

1. temperatureis heated
2. temperatureat reflux for 20 minutes
3. customThe solution is partitioned between ethyl acetate and saturated sodium bicarbonate
4. dry with materialThe organic layer is dried over magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe residue is partitioned between ethyl acetate
8. dry with materialThe organic layer is dried over magnesium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. additionEthyl acetate and diethyl ether are added to the residue
12. filtrationthe resultant orange solid is collected by filtration