Radical Pentafluoroethylation of Unactivated Alkenes Using CuCF<sub>2</sub>CF<sub>3</sub>
作者:Xinkan Yang、Gavin Chit Tsui
DOI:10.1021/acs.orglett.0c01646
日期:2020.6.5
source for the CF2CF3 radical under aerobic conditions at room temperature. Using this system, readily available unactivatedalkenes can be pentafluoroethylated to provide novel allylic CF2CF3 compounds with excellent E-selectivity and functional group tolerability. Mechanistic studies including TEMPO–CF2CF3 trapping and radical clock experiments provided strong evidence for radical pathways, offering
Pentafluoroethylation of Arenediazonium Tetrafluoroborates Using On‐Site Generated Tetrafluoroethylene
作者:Bo Xing、Lingchun Li、Chuanfa Ni、Jinbo Hu
DOI:10.1002/cjoc.201900268
日期:2019.11
Copper‐mediated pentafluoroethylation of arenediazonium tetrafluoroborates with tetrafluoroethylene (TFE) on‐site generated from TMSCF3 has been developed as a new method to prepare pentafluoroethyl arenes. The active pentafluoroethylation reagent “CuC2F5” is pre‐generated from CuSCN, TFE and CsF, and its generation and further reaction are strongly solvent‐dependent. This pentafluoroethylation reaction
已经开发了由TMSCF 3现场产生的四氟硼酸芳族二唑鎓与四氟乙烯(TFE)的铜介导的五氟乙基化,这是制备五氟乙基芳烃的一种新方法。活性五氟乙基化试剂“ CuC 2 F 5 ”是由CuSCN,TFE和CsF预先生成的,其生成和进一步的反应强烈依赖于溶剂。该五氟乙基化反应代表了Sandmeyer型五氟乙基化的第一个例子,它具有良好的官能团耐受性,并且在合成复杂的生物活性化合物方面具有潜在的应用价值。
Formation of group 11 trifluoromethyl derivatives by reaction of Cd(CF3)2·glyme with representative Au, Ag, and Cu complexes: isolation of Au(CF3)3(PMe3), Au(CF3)3(PEt3), AuI(CF3)2(PMe3), AuCF3(PMe3), AuCF3(PEt3) and AgCF3(PMe3); observation of CuCF3(PMe3)
作者:H.K. Nair、J.A. Morrison
DOI:10.1016/0022-328x(89)88083-0
日期:1989.10
between CF3I and AuCF3(PEt3) eventually (12 d) forms Au(CF3)3(PEt3) and AuI(PEt3), but, at ambient temperature, the exposure of AuCF3(PEt3) to C2F5I yields the pentafluoroethyl gold(I) complex, AuC2F5(PEt3), along with CF3I and AuI(CF3)2(PEt3). No reaction between AuBr(PEt3) and CF3I was observed. If PMe3 is added to solutions that initially contained AgOAc and Cd(CF3)2 · glyme, AgCF3(PMe3), 36%, is formed
[EN] PENTAFLUOROETHYLATING COMPOSITIONS<br/>[FR] COMPOSITIONS DE PENTAFLUOROÉTHYLATION
申请人:FUNDACIÓ INST CATAL D INVESTIGACIÓ QUÍMICA
公开号:WO2015018855A1
公开(公告)日:2015-02-12
The present invention relates to pentafluoroethylating compositions, processes for obtaining them, and their use in pentafluoroethylation reactions.
这项发明涉及五氟乙基化组合物,获得它们的过程,以及它们在五氟乙基化反应中的应用。
Cyclic-Protected Hexafluoroacetone as an Air-Stable Liquid Reagent for Trifluoromethylations
作者:Kazuyuki Negishi、Kohsuke Aikawa、Koichi Mikami
DOI:10.1002/ejoc.201600711
日期:2016.8
reagent is readily synthesized from gaseous hexafluoroacetone and 2-methylproline on a gram scale. The reaction of the trifluoromethylating reagent with tert-butoxy cuprate K[Cu(OtBu)2] leads to the CuCF3 in high yield. This species is directly formed from the tetrahedral cuprate intermediate through intramolecular migration of the trifluoromethyl group to copper. The CuCF3 reagent prepared in situ by