Regioselective Vinylation of Remote Unactivated C(sp<sup>3</sup>)−H Bonds: Access to Complex Fluoroalkylated Alkenes
作者:Shuo Wu、Xinxin Wu、Dongping Wang、Chen Zhu
DOI:10.1002/anie.201812927
日期:2019.1.28
particular functional group into aliphatic sites by direct activation of unreactive C−H bonds is of great synthetic value. Despite advances in radical‐mediated functionalization of C(sp3)−H bonds by a hydrogen‐atom transfer process, the site‐selective vinylation of remote C(sp3)−H bonds still remains underexplored. Reported herein is a new protocol for the regioselective vinylation of unactivatedC(sp3)−H
2,2-dimethylcyclopropyl 4-methylphenyl ketone as a SET probe
作者:Jack W. Timberlake、Tonghua Chen
DOI:10.1016/0040-4039(94)88070-0
日期:1994.8
2,2-Dimethylcyclopropyl4-methylphenylketone in the presence of SmI2 and DMPU is a good SETprobe. The ortho positions of the aromatic ring provide a good source to trap the newly formed tertiary radical.
Regioselective Sulfonylvinylation of the Unactivated C(sp<sup>3</sup>)–H Bond via a C-Centered Radical-Mediated Hydrogen Atom Transfer (HAT) Process
作者:Shan Yang、Xinxin Wu、Shuo Wu、Chen Zhu
DOI:10.1021/acs.orglett.9b01734
日期:2019.6.21
Given the similarity of multiple sp(3) C-H bonds in electronic properties and bond dissociation energy (DE), regioselective sp(3) C-H bond functionalization remains a paramount challenge. Here, we report a C-centered radical-mediated approach for site-specific sulfonylvinylation of the C(sp(3))-H bond via the hydrogen atom transfer (HAT) process. The reaction features mild conditions, broad substrate scope, and high regioselectivity and stereoselectivity, manifesting the nontrivial synthetic potential.