Copper‐Catalyzed Alkynylation of C(
<i>sp</i>
<sup>3</sup>
)−H Bonds in
<i>N</i>
‐Fluoro‐sulfonamides
作者:Zhiping Yin、Youcan Zhang、Shuo Zhang、Xiao‐Feng Wu
DOI:10.1002/adsc.201900992
日期:2019.12.3
Herein, we developed a copper‐catalyzed approach for the remote C(sp3)−H alkynylation of N‐fluoro‐sulfonamides. With Cu(OTf)2 as the catalyst, the carbon radical which generated from nitrogen radical‐mediated 1,5‐hydrogen atom transfer, go through an addition/fragmentation reaction with various acetylene sulfones. A variety of internal alkynes were synthesized in high yield and regioselectivity. Notably
在这里,我们开发了一种铜催化的方法,用于N-氟磺酰胺的远程C(sp 3)-H炔基化反应。以Cu(OTf)2为催化剂,由氮自由基介导的1,5-氢原子转移产生的碳自由基与各种乙炔砜进行加成/片段化反应。以高收率和区域选择性合成了多种内部炔烃。值得注意的是,在标准条件下,塞来昔布衍生的底物也可以良好的产率得到相应的功能化产品。