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
One-pot synthesis of trifluoromethyl amines and perfluoroalkyl amines with CF<sub>3</sub>SO<sub>2</sub>Na and R<sub>f</sub>SO<sub>2</sub>Na
作者:Shuaishuai Liang、Jingjing Wei、Lvqi Jiang、Jie Liu、Yasir Mumtaz、Wenbin Yi
DOI:10.1039/c9cc03282g
日期:——
A newly developed CF3SO2Na-based trifluoromethylation of secondary amines has been disclosed, and the method has been successfully extended to the configuration of perfluoroalkyl amines using RfSO2Na, complementing the established synthesis strategy of trifluoromethyl amines. Advantages of the method include good functional group tolerance, mild conditions, and inexpensive or easy-to-handle materials
已经公开了新开发的基于仲胺的基于CF 3 SO 2 Na的三氟甲基化,并且该方法已经成功地扩展到使用R f SO 2 Na的全氟烷基胺的构型,补充了已建立的三氟甲基胺的合成策略。该方法的优点包括良好的官能团耐受性,温和的条件以及廉价或易于处理的材料。机理探针表明,原位形成的硫代羰基氟化物是反应中的关键中间体。
Direct Trifluoromethylthiolation and Perfluoroalkylthiolation of C(sp
<sup>2</sup>
)H Bonds with CF
<sub>3</sub>
SO
<sub>2</sub>
Na and R
<sub>f</sub>
SO
<sub>2</sub>
Na
A new method for CF3SO2Na‐based direct trifluoromethylthiolation of C(sp2)H bonds has been developed. CF3SSCF3 is generated in situ from cheap and easy‐to‐handle CF3SO2Na, and in the presence of CuCl can be used for electrophilic trifluoromethylthiolation of indoles, pyrroles, and enamines. The method has been extended to perfluoroalkylthiolation reactions using RfSO2Na.
已开发出一种基于CF 3 SO 2 Na的C(sp 2)H键直接三氟甲基硫醇化的新方法。CF 3 SSCF 3是由便宜且易于处理的CF 3 SO 2 Na原位生成的,在存在CuCl的情况下,可用于吲哚,吡咯和烯胺的亲电三氟甲基硫醇化反应。该方法已扩展到使用R f SO 2 Na的全氟烷基硫醇化反应。
Selective Trifluoromethylthiolation and Trifluoromethylsulfinylation of Indoles with Sodium Trifluoromethanesulfinate Promoted by Phosphorus Reagents
作者:Dong-Wei Sun、Xu Jiang、Min Jiang、Yun Lin、Jin-Tao Liu
DOI:10.1002/ejoc.201700661
日期:2017.6.30
Direct trifluoromethylthiolation and trifluoromethylsulfinylation reactions by using sodium trifluoromethanesulfinate were promoted by different phosphorusreagents to selectively occur under mild and transition-metal-free conditions. In the presence of phosphorus trichloride, sodium trifluoromethanesulfinate readily underwent a reaction with indole and its derivatives in N,N-dimethylformamide (DMF) at
Photocatalytic Difunctionalization of Vinyl Ureas by Radical Addition Polar Truce–Smiles Rearrangement Cascades
作者:Roman Abrams、Jonathan Clayden
DOI:10.1002/anie.202003632
日期:2020.7.6
We report tandem alkyl‐arylations and phosphonyl‐arylations of vinyl ureas by way of a photocatalytic radical‐polar crossover mechanism. Addition of photoredox‐generated radicals to the alkene forms a new C−C or C−P bond and generates a product radical adjacent to the urea function. Reductive termination of the photocatalytic cycle generates an anion that undergoes a polar Truce–Smiles rearrangement