Nitration of Azasydnones and Azasydnonimines: A Method for the Functionalization of Aryl Derivatives
作者:Igor L. Dalinger、Olga V. Serushkina、Dmitry L. Lipilin、Aleksei A. Anisimov、Kyrill Yu. Suponitsky、Aleksei B. Sheremetev
DOI:10.1002/cplu.201900243
日期:2019.7
attached to the aryl ring, and a variety of polyfunctionalized derivatives can be readily accessed by using this methodology, which may have applications in the target-oriented synthesis. The reactivity, synthesis, and structure of the mesoionic 3-substituted-1,2,3,4-oxatriazole derivatives described here provide interesting new information on this known but poorly understood heterocycle.
介电的3-R-1,2,3,4-恶三唑-5-酮和3-取代的1,2,3,4-恶三唑-5-亚胺(分别为氮杂和壬二胺)官能化的第一个例子据报道,亲电反应不会破坏草三唑环。为了开发一种合成相应硝基芳基衍生物的方法,已经评估了使用HNO3 / H2SO4混合物对一系列在邻位,间位和对位带有多个给电子和吸电子取代基的芳基衍生物的硝化作用。硝化发生在氮杂亚砜环的间位,而亲电取代的区域选择性会受到与芳环相连的取代基性质的影响,并且使用这种方法可以很容易地获得各种多官能化衍生物,可能在面向目标的合成中有应用。本文所述的中离子3-取代的1,2,3,4-氧杂三唑衍生物的反应性,合成和结构提供了有关该已知但知之甚少的杂环的有趣的新信息。