作者:Janusz B. Kyziol、Zdzislaw Daszkiewicz
DOI:10.1016/s0040-4020(01)91140-8
日期:1984.1
Nitration of9-tosylcarbazole in acetic anhydride solution gives l-nitro (28%), 2-nitro (19%) and 3-nitro (53%) derivatives. The mixture of the nitro compounds obtained from 9-acetylcarbazole contains 10%, 48% and 42% of the isomers, respectively. Under similar conditions 9-nitrosocarbazole shows a different isomer distribution: 34% of 1-nitro and 66% of 3-nitrocarbazole. Nitration of carbazole is a
在乙酸酐溶液中硝化9-甲苯磺基咔唑得到1-硝基(28%),2-硝基(19%)和3-硝基(53%)衍生物。由9-乙酰基咔唑得到的硝基化合物的混合物分别包含10%,48%和42%的异构体。在类似条件下,9-亚硝基咔唑显示出不同的异构体分布:34%的1-硝基和66%的3-硝基咔唑。咔唑的硝化是两步过程,涉及9-硝基咔唑的形成和重排。1,3,6,8-四氯咔唑的硝化作用和9-硝基咔唑的氧化作用以及硝化条件下9-硝基咔唑的重排结果支持了这一假设。