反应详情

4-Chloro-2-fluoro-phenol (264 mg, 1.8 mmol) was added to a solution of 7-benzyloxy-4-chloro-6-methoxyquinazoline hydrochloride (506 mg, 1.5 mmol), (prepared as described for the starting material in Example 1), in pyridine (8 ml) and the mixture heated at reflux for 45 minutes. The solvent was removed by evaporation and the residue partitioned between ethyl acetate and water. The organic layer was washed with 0.1M hydrochloric acid, water and brine, dried (MgSO4) and the solvent removed by evaporation. The solid residue was triturated with petroleum ether and the crude product collected by filtration and purified by flash chromatography eluting with methylene chloride/ether (9/1) to give 7-benzyloxy-4-(4-chloro-2-fluorophenoxy)-6-methoxyquinazoline (474 mg, 77%) as a cream solid.

1. custom(prepared
2. temperaturethe mixture heated
3. temperatureat reflux for 45 minutes
4. customThe solvent was removed by evaporation
5. customthe residue partitioned between ethyl acetate and water
6. washThe organic layer was washed with 0.1M hydrochloric acid, water and brine
7. dry with materialdried (MgSO4)
8. customthe solvent removed by evaporation
9. customThe solid residue was triturated with petroleum ether
10. filtrationthe crude product collected by filtration
11. custompurified by flash chromatography
12. washeluting with methylene chloride/ether (9/1)