反应详情

Dimethylformamide (23 ml) was added to 4-(3-chloro-2-fluoroanilino)-6-hydroxy-7-methoxyquinazoline, tert-butyl 3-[(4-nitrophenyl)sulfonyloxy]piperidine-1-carboxylate (1.93 g) and cesium fluoride (2.28 g). The reaction mixture was then stirred at room temperature for 4 days. The reaction mixture was evaporated under vacuum and partitioned between methylene chloride and water. The solutions were filtered to remove insoluble solids and the methylene chloride was washed with water and saturated brine and adsorbed onto silica. The product was then purified by column chromatography on silica eluting with increasingly polar mixtures of methylene chloride/methanol (100/0 to 94/6). The fractions containing the required product were combined and evaporated under vacuum to give 4-(3-chloro-2-fluoroanilino)-6-(1-tert-butoxycarbonylpiperidin-3-yloxy)-7-methoxyquinazoline as a yellow gum (0.67 g); Mass Spectrum: (M+H)+ 503.

1. customThe reaction mixture was evaporated under vacuum
2. custompartitioned between methylene chloride and water
3. filtrationThe solutions were filtered
4. customto remove insoluble solids
5. washthe methylene chloride was washed with water and saturated brine
6. customThe product was then purified by column chromatography on silica eluting
7. temperaturewith increasingly polar mixtures of methylene chloride/methanol (100/0 to 94/6)
8. additionThe fractions containing the required product
9. customevaporated under vacuum