作者:Zhiliang Huang、Dongchao Zhang、Xiaotian Qi、Zhiyuan Yan、Mengfan Wang、Haiming Yan、Aiwen Lei
DOI:10.1021/acs.orglett.6b00764
日期:2016.5.20
A new method was demonstrated to overcome the selectivity issue of radical–radical cross-coupling toward the synthesis of asymmetric diaryl thioethers. The preliminary mechanism was revealed by radical-trapping experiments, DFT calculations, and kinetics, etc., indicating that the C–S bond formed through cross-coupling of a thiyl radical and an aryl radical cation. Moreover, the formation of an aryl
实验证明了一种新方法可以克服自由基-自由基交叉偶联对不对称二芳基硫醚合成的选择性问题。自由基捕获实验,DFT计算和动力学等方法揭示了其初步机理,表明通过硫基自由基和芳基阳离子的交叉偶联形成了C–S键。此外,形成芳基阳离子而不是C–H键断裂被确定为限速步骤。