From C
<sub>1</sub>
to C
<sub>2</sub>
: TMSCF
<sub>3</sub>
as a Precursor for Pentafluoroethylation
作者:Qiqiang Xie、Lingchun Li、Ziyue Zhu、Rongyi Zhang、Chuanfa Ni、Jinbo Hu
DOI:10.1002/anie.201807873
日期:2018.10
A highly efficient copper‐mediated aromatic pentafluoroethylation method using TMSCF3 as the sole fluoroalkyl source is described. The reaction proceeds by a key C1 to C2 process, that is, the generation of CuCF3 from TMSCF3, followed by a subsequent spontaneous transformation into CuC2F5. Various aryl iodides were pentafluoroethylated with the TMSCF3‐derived CuC2F5. This method represents the first
Cu<sup>I</sup>
-Catalyzed Pentafluoroethylation of Aryl Iodides in the Presence of Tetrafluoroethylene and Cesium Fluoride: Determining the Route to the Key Pentafluoroethyl Cu<sup>I</sup>
Intermediate
The Cu(I)‐catalyzed pentafluoroethylation of iodoarenes via the fluorocupration of tetrafluoroethylene (TFE) is disclosed. The active species, (phen)CuC2F5, was isolated and its molecular structure confirmed by a single‐crystal X‐ray diffraction analysis. The key to the successful suppression of the competing oligomerization of TFE is to refrain from stirring the reaction mixture. A mechanistic study
公开了通过四氟乙烯(TFE)的氟代杯化反应,由铜(I)催化的碘代芳烃的五氟乙基化。分离了活性物质(phen)CuC 2 F 5,并通过单晶X射线衍射分析确认了其分子结构。成功抑制TFE竞争性低聚的关键是避免搅拌反应混合物。机理研究清楚地放弃了催化反应通过自由基途径进行的可能性。
Copper-mediated pentafluoroethylation of organoboronates and terminal alkynes with TMSCF<sub>3</sub>
作者:Shitao Pan、Qiqiang Xie、Xiu Wang、Qian Wang、Chuanfa Ni、Jinbo Hu
DOI:10.1039/d2cc00975g
日期:——
The TMSCF3-derived CuCF2CF3 species has been successfully applied in pentafluoroethylation of organoboronates and terminal alkynes.
TMSCF3衍生的CuCF2CF3物种已成功应用于有机硼酸酯和末端炔烃的五氟乙基化反应。
TMSCF
<sub>3</sub>
as a Convenient Source of CF
<sub>2</sub>
=CF
<sub>2</sub>
for Pentafluoroethylation, (Aryloxy)tetrafluoroethylation, and Tetrafluoroethylation
作者:Lingchun Li、Chuanfa Ni、Qiqiang Xie、Mingyou Hu、Fei Wang、Jinbo Hu
DOI:10.1002/anie.201705734
日期:2017.8.7
A new method for the on-site preparation of tetrafluoroethylene (TFE) and a procedure for its efficient use in pentafluoroethylation by fluoride addition were developed by using a simple two-chamber system. The on-site preparation of TFE was accomplished by dimerization of difluorocarbene derived from (trifluoromethyl)trimethylsilane (TMSCF3) under mild conditions. Other fluoroalkylation reactions