反应详情

1,1′-(Azodicarbonyl)dipiperidine (525 mg, 2.1 mmol) was added in portions to a mixture of 4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (225 mg, 7.0 mmol), (prepared as described for the starting material in Example 2), tributylphosphine (420 mg, 2.1 mmol) and 4-(2-hydroxyethyl)-1,1-dioxothiomorpholine (140 mg, 7.8 mmol) in methylene chloride (10 ml). The mixture was stirred for 18 hours, diluted with ether and the resulting precipitate was removed by filtration. The volatiles were removed from the filtrate by evaporation, and the residue was dissolved in acetone and ethereal hydrogen chloride (14 ml of a 1M solution, 14 mmol) and the precipitate was collected by filtration. The residue was purified by column chromatography eluting with methylene chloride/methanol/aqueous ammonia (150/8/1). The purified product was triturated with ether/methylene chloride collected by filtration and dried to give 4-(4-chloro-2-fluoroanilino)-7-(2-(1,1-dioxothiomorpholino)ethoxy)-6-methoxyquinazoline (120 mg, 36%).

1. custom(prepared
2. customthe resulting precipitate was removed by filtration
3. customThe volatiles were removed from the filtrate by evaporation
4. dissolutionthe residue was dissolved in acetone
5. filtrationethereal hydrogen chloride (14 ml of a 1M solution, 14 mmol) and the precipitate was collected by filtration
6. customThe residue was purified by column chromatography
7. washeluting with methylene chloride/methanol/aqueous ammonia (150/8/1)
8. customThe purified product was triturated with ether/methylene chloride
9. filtrationcollected by filtration
10. customdried