Reactivity and substituent effects in the cyclization of N -aryl-2-nitrosoanilines to phenazines
作者:Zbigniew Wróbel、Karolina Plichta、Andrzej Kwast
DOI:10.1016/j.tet.2017.04.046
日期:2017.6
estimated on the base of the observed reaction times. A strong opposite effect of substituents located at position para to the nitroso group and those located para to the amino group in the side ring was observed. Mechanistic explanation, based on the electronic properties of the substituents and their mesomeric effects, was presented. The usefulness of the obtained data for the designed syntheses of
根据观察到的反应时间,估算了在N,O-双(三甲基甲硅烷基)乙酰胺(BSA)存在下进行环化反应生成吩嗪衍生物的反应中,各种取代的N-芳基-2-亚硝基苯胺的反应活性。。观察到在侧环中位于亚硝基对位的取代基与位于氨基对位的取代基有强烈的相反作用。提出了基于取代基的电子性质及其介观效应的机理解释。公开了所获得的数据对于吩嗪的设计合成的有用性。