作者:Jian-Jun Dai、Chi Fang、Bin Xiao、Jun Yi、Jun Xu、Zhao-Jing Liu、Xi Lu、Lei Liu、Yao Fu
DOI:10.1021/ja404217t
日期:2013.6.12
A copper-promoted trifluoromethylation reaction of aromatic amines is described. This transformation proceeds smoothly under mild conditions and exhibits good tolerance of many synthetically relevant functional groups. It provides an alternative approach for the synthesis of trifluoromethylated arenes and heteroarenes. It also constitutes a new example of the Sandmeyer reaction.
Copper-catalyzed trifluoromethylation of organic zinc reagents with an electrophilic trifluoromethylating reagent
作者:Chang-Sheng Wang、Haoyang Wang、Cheng Yao
DOI:10.1039/c5ra02279g
日期:——
A copper-catalyzedtrifluoromethylation of aryl, vinyl and alkyl zinc reagents with Togni's reagent was described. Mechanistic studies indicated that the aryl group is initially transferredfrom the zinc reagent to hypervalent iodine to form a tri-substituted hypervalent iodine intermediate. Consequent reductive-elimination via a concerted bond-forming step and/or radical pathway from this intermediate
The Trifluoromethylating Sandmeyer Reaction: A Method for Transforming CN into CCF<sub>3</sub>
作者:Duncan L. Browne
DOI:10.1002/anie.201308997
日期:2014.2.3
trifluoromethylate: The beneficial properties imparted by the trifluoromethylation of aromatic compounds continue to drive the discovery of novel reagents and reactions for the late‐stage introduction of such moieties. Highlighted here is the recently discovered Sandmeyer trifluoromethylation approach, which now permits aromatic amines to be substrates in a direct trifluoromethylation strategy.
Copper-Promoted Trifluoromethanesulfonylation and Trifluoromethylation of Arenediazonium Tetrafluoroborates with NaSO<sub>2</sub>CF<sub>3</sub>
作者:Ke Zhang、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.joc.5b01295
日期:2015.8.7
A tunable chemoselective trifluoromethanesulfonylation and trifluoromethylation of arenediazonium tetrafluoroborates with Langlois' reagent (NaSO2CF3) was developed. The Cu2O-catalyzed reaction in DMSO gave aryl trifluoromethanesulfones as the major products. On the other hand, the trifluoromethylated arenes were produced in the presence of oxidant tert-butyl hydroperoxide, CuBF4(MeCN)(4), and 2,2';6',2 ''-terpyridine (tpy). Both of these transformations proceed under mild conditions and tolerate functional groups.