Department of Chemistry, Queen's University, Kingston, Ontario, Canada.
J Am Chem Soc. 2012 May 23;134(20):8306-9. doi: 10.1021/ja300086z. Epub 2012 Mar 1.
The incorporation of nitrogen atoms into the aryl rings of conventional diphenylamine antioxidants enables the preparation of readily accessible, air-stable analogues, several of which have temperature-independent radical-trapping activities up to 200-fold greater than those of typical commercial diphenylamines. Amazingly, the nitrogen atoms raise the oxidation potentials of the amines without greatly changing their radical-trapping (H-atom transfer) reactivity.
将氮原子引入传统二苯胺抗氧化剂的芳环中，可制备出易于获得、空气稳定的类似物，其中几种的自由基捕获活性在 200 倍以上，与典型的商业二苯胺相比，温度独立。令人惊讶的是，氮原子提高了胺的氧化电位，而对其自由基捕获（氢原子转移）反应性的影响不大。
