Site‐Selective Alkenylation of Unactivated C(sp
<sup>3</sup>
)−H Bonds Mediated by Compact Sulfate Radical
作者:Mitsuhiro Ueda、Kazuya Kamikawa、Takahide Fukuyama、Yi‐Ting Wang、Yen‐Ku Wu、Ilhyong Ryu
DOI:10.1002/anie.202011992
日期:2021.2.15
A broad variety of unactivated acyclic and alicyclic substrates cleanly undergo site‐selective alkenylation of unactivated C(sp3)−H bonds with 1,2‐bis(phenylsulfonyl)ethene in the presence of persulfate. This simple transformation furnishes (E)‐2‐alkylvinylphenylsulfones in up to 88 % yield. In contrast with the previously reported decatungstate protocol, the current method is applicable to alkenylation
在过硫酸盐的存在下,各种各样的未活化的无环和脂环族底物会干净地进行未活化的C(sp 3)-H键与1,2-双(苯磺酰基)乙烯的位点选择性烯基化反应。这种简单的转化以高达88%的收率提供了(E)-2-烷基乙烯基苯基砜。与先前报道的十碳酸盐协议相反,当前方法适用于空间受阻的CH键的烯基化。这个重要的优势显着拓宽了底物的范围,并且归因于在CH活化和裂解中使用的硫酸根的紧凑尺寸。