反应详情

Diethyl azodicarboxylate (236 μl, 1.5 mmol) was added dropwnise to a suspension of 4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (160 mg, 0.5 mmol), (prepared as described for the starting material in Example 24), triphenylphosphine (393 mg, 1.5 mmol) and 2-(3-pyridyl)ethanol (86 mg, 0.7 mmol), (J.Heterocycl. Chem. 1992, 29, 1663), in methylene chloride (6 ml) and the mixture stirred for 4 hours at ambient temperature. The mixture was poured directly on to a silica column and eluted with methylene chloride/acetonitrile/methanol (60/35/5). The purified solid was dissolved in methylene chloride/methanol and ethereal hydrogen chloride (1.5 ml of a 4.5M solution) was added. The volatiles were removed by evaporation, the solid residue was suspended in ether, collected by filtration, washed with ether and dried under vacuum to give 4-(4-chloro-2-fluoroanilino)-6-methoxy-7-(2-(3-pyridyl)ethoxy)quinazoline hydrochloride (154 mg, 52%).

1. custom(prepared
2. additionThe mixture was poured directly on to a silica column
3. washeluted with methylene chloride/acetonitrile/methanol (60/35/5)
4. dissolutionThe purified solid was dissolved in methylene chloride/methanol
5. additionethereal hydrogen chloride (1.5 ml of a 4.5M solution) was added
6. customThe volatiles were removed by evaporation
7. filtrationcollected by filtration
8. washwashed with ether
9. customdried under vacuum