Direct Assembly of Polysubstituted Furans via C(<i>sp</i>
<sup>3</sup>
)−H Bond Functionalization by Using Dimethyl Sulfoxide as a Dual Synthon
作者:Yufeng Liu、Yuqun Hu、Zhongzhong Cao、Xi Zhan、Weiping Luo、Qiang Liu、Cancheng Guo
DOI:10.1002/adsc.201801429
日期:2019.3.5
An unusual I2‐mediated triple C(sp3)−H functionalization reaction between aryl methyl ketones and dimethyl sulfoxide to form polysubstituted furans has been developed. In this transformation, dimethyl sulfoxide functions as a dual synthon via C(sp3)−H functionalization with formation of two C−C bonds, one C−O bond, and one C−S bond in a one‐step process. Iodine is crucial as promoter of the reaction
已经开发了一种不寻常的I 2介导的三甲基C(sp 3)-H在芳基甲基酮和二甲基亚砜之间形成多取代呋喃的功能化反应。在此转化中,二甲基亚砜通过C(sp 3)-H官能化作为双合成子,在一步过程中形成两个C-C键,一个C-O键和一个C-S键。碘是反应的关键,通过它碘可以很容易地将许多酮转化为2,4,5-三取代的呋喃。这为高附加值,具有生物学意义的O-杂环提供了一种极其简单,快捷的方法。在初步实验的基础上,提出了一个合理的机制。