Synthesis of 4-azido-3-diazo-3H-pyrazolo[3,4-b]quinoline from 3-amino-4-hydrazino-1H-pyrazolo[3,4-b]quinoline
作者:Wolfgang Stadlbauer、Gerhard Hojas
DOI:10.1039/b004681g
日期:——
The reaction of 3-amino-4-hydrazino-1H-pyrazolo[3,4-b]quinoline 8 with nitrous acid did not give 2,4-diazidoquinoline-3-carbonitrile 5 as reported previously, but afforded in 60% yield 4-azido-3-diazopyrazolo[3,4-b]quinoline 10, which gave by azo coupling with 2-naphthol 4-azido-3-(2-hydroxy-1-naphthylazo)-1H-pyrazolo[3,4-b]quinoline 11.
3- 氨基-4-肼基-1H-吡唑并[3,4-b]喹啉 8 与亚硝酸的反应并没有像之前报道的那样得到 2,4-二叠氮喹啉-3-甲腈 5,而是以 60% 的收率得到了 4-叠氮-3-二氮并吡唑并[3,4-b]喹啉 10,通过与 2-萘酚的偶氮偶联得到了 4-叠氮-3-(2-羟基-1-萘偶氮)-1H-吡唑并[3,4-b]喹啉 11。