作者:Huang Qiu、Ming Li、Li-Qin Jiang、Feng-Ping Lv、Li Zan、Chang-Wei Zhai、Michael P. Doyle、Wen-Hao Hu
DOI:10.1038/nchem.1406
日期:2012.9
trap the zwitterionic intermediates. Here, we describe the use of imines, activated by chiral organocatalysts, and a highly efficient integrated rhodium and chiral Brønsted acid co-catalysed process to trap zwitterionic intermediates that have been proposed previously to undergo a formal C–H insertion reaction, allowing us to obtain polyfunctionalized indole and oxindole derivatives in a single step
与过渡金属催化过程中产生的不稳定和高活性两性离子中间体的反应为分子构建提供了新的机会。插入反应涉及两性离子中间体的坍塌,但捕获它们将允许进行目前尚不可用的结构细化。为了以这种方式合成复杂的分子,可以使用反应性亲电试剂来捕获两性离子中间体。在这里,我们描述了使用由手性有机催化剂活化的亚胺,以及高效的铑和手性布朗斯台德酸共催化过程来捕获先前已提出进行正式 C-H 插入反应的两性离子中间体,