Fused quinoline heterocycles I. First example of the 2,4-diazidoquinoline-3-carbonitrile and 1-aryl-1,5-dihydro-1,2,3,4,5,6-hexaazaacephenanthrylenes ring systems
作者:Ramadan A. Mekheimer
DOI:10.1039/a901521c
日期:——
4-Alkylamino-2-chloroquinoline-3-carbonitriles 2a–f react with hydrazine hydrate to give, in each case, the corresponding 3-amino-4-hydrazino-1H-pyrazolo[3,4-b]quinoline 7. Diazotization of 7 leads to the formation of 2,4-diazidoquinoline-3-carbonitrile 8, a new heterocyclic ring system. The azidoquinoline 8 can be converted to the corresponding aminoquinolines 14, and 15 and 16, by reaction with morpholine and sodium dithionite, respectively. On the other hand, 3-amino-4-arylamino-1H-pyrazolo[3,4-b]quinolines 4g–j were prepared by reaction of 4-arylamino-2-chloroquinoline-3-carbonitriles 2g–j with hydrazine hydrate at 50–60 °C. Diazotization of 4g–j afforded the novel tetracyclic ring system 1-aryl-1,5-dihydro-1,2,3,4,5,6-hexaazaacephenanthrylenes 5g–j.
4-烷基氨基-2-氯喹啉-3-甲腈 2a-f 与水合肼反应,分别生成相应的 3-氨基-4-肼基-1H-吡唑并[3,4-b]喹啉 7。对 7 进行重氮化处理,可生成 2,4-叠氮喹啉-3-甲腈 8,这是一种新的杂环系统。叠氮喹啉 8 可分别与吗啉和二亚硫酸钠反应,转化为相应的氨基喹啉 14、15 和 16。另一方面,3-氨基-4-芳基氨基-1H-吡唑并[3,4-b]喹啉 4g-j 是通过 4-芳基氨基-2-氯喹啉-3-甲腈 2g-j 与水合肼在 50-60 °C 下反应制备的。对 4g-j 进行重氮化处理后,得到了新型四环系统 1-芳基-1,5-二氢-1,2,3,4,5,6-六氮杂菲林 5g-j。