反应详情

温度

0 °C

A solution of 7-(3-(4-methylpiperazin-1-yl)propoxy)-6-methoxy-3,4-dihydroquinazolin-4-one (22.6 g, 68 mmol) in thionyl chloride (300 ml) cotaining DMF (5 ml) was refluxed for 2 hours. After cooling, the volatiles were removed under vacuum and the residue was azeotroped with toluene twice. The solid was dissolved in methulene chloride and water was added. The mixture was cooled to 0° C. and the pH of the aqueous layer was adjusted to 7 with solid hydrogen carbonate and then raised to 10 with 6N Sodium hydroxide. The organic layer was separated and the aqueous layer was extracted with methylene chloride. The organic layer was washed with brine, dried (MgSO4), filtered and the volatiles were removed under vacuum. The residue was triturated with ether, filtered, washed with ether and dried under vacuum to give 4-chloro-6-methoxy-7-(3-(4-methylpiperazin-1-yl)propoxy)quinazoline (16.3 gr, 68%).

1. temperaturewas refluxed for 2 hours
2. temperatureAfter cooling
3. customthe volatiles were removed under vacuum
4. customthe residue was azeotroped with toluene twice
5. dissolutionThe solid was dissolved in methulene chloride
6. additionwater was added
7. temperatureraised to 10 with 6N Sodium hydroxide
8. customThe organic layer was separated
9. extractionthe aqueous layer was extracted with methylene chloride
10. washThe organic layer was washed with brine
11. dry with materialdried (MgSO4)
12. filtrationfiltered
13. customthe volatiles were removed under vacuum
14. customThe residue was triturated with ether
15. filtrationfiltered
16. washwashed with ether
17. customdried under vacuum