Also, an improvement of overall efficiency was demonstrated by the use of a labile O-silyl group. A bicyclization/ring-opening mechanism, inspired by the Favorskii rearrangement, was proposed and supported by the DFT calculations. Furthermore, the efforts on scope expansion as well as the evaluation of other electrophilic promoters revealed that the newly developed ring contraction reactivity is a
发现并利用亲电子
氯化试剂
三氯异氰尿酸(TCICA)对
1,2-二嗪进行了前所未有的N-
氯化环收缩。通过优化和机理分析,确定了n -Bu 4 NCl作为外源性亲核试剂的辅助作用,并将优化的反应条件应用于一系列1,4-二甲
氧基邻
苯二甲酰
肼衍
生物。同样,通过使用不稳定的O证明了整体效率的提高。-
硅烷基。提出了一种由Favorskii重排启发的双环化/开环机制,并得到DFT计算的支持。此外,在范围扩大方面的努力以及对其他亲电性启动子的评估表明,新开发的环收缩反应性是1,4-二甲
氧基邻
苯二甲
酰胺骨架和TCICA的独特特征。