Synthesis and Preliminary Antimicrobial Activity of New Pyrimido[4,5-<i>b</i>]-quinoline and Pyrido[2,3-<i>d</i>]pyrimidine
作者:A. B. A. El-Gazzar、A. S. Aly、M. E. A. Zaki、H. N. Hafez
DOI:10.1080/10426500701851283
日期:2008.8.4
5-b]quinoline (5) and pyrido[2,3-d]-pyrimidine (12), were easily prepared from the cyclo-condensation of α,β -unsaturated ketones and 6-aminothiouracil. Compound 5 reacted with different amines to give 8-aryl-amino- (6,7), 2,4-dihydrazino-pyrimido[4,5-b]quinoline (9). Compound 7 was converted into benzo[h]-12,13-dihydrobenzo[a]-pyrimido[3′,2′:1,6]pyrimido[4,5-b]-quinoline (8) with a new ring system. The 2,
4-Chloro-2-methylthio-benzo[h]pyrimido[4,5-b]quinoline (5) 和pyrido[2,3-d]-pyrimidine (12),很容易从 α 的环缩合反应制备, β-不饱和酮和6-氨基硫尿嘧啶。化合物 5 与不同的胺反应得到 8-芳基-氨基-(6,7), 2,4-二肼基-嘧啶并[4,5-b]喹啉(9)。将化合物 7 转化为具有新环系的苯并[h]-12,13-二氢苯并[a]-嘧啶[3',2':1,6]嘧啶[4,5-b]-喹啉(8)。2,4-二肼基与甲酸反应得到苯并[h]-s-三唑并[4',3':1,6]-s-三唑并[3",4":2,3]嘧啶[4] ,5-b] 喹啉 (10) 与新的环系统。此外,(12)与溴丙二腈反应得到3-氨基-噻唑并[4,5-a]吡啶并[2,3-d]嘧啶-2-甲腈(13)。化合物13与甲酸、尿素、硫脲、甲酰胺反应得到嘧啶[4'