Copper-mediated trifluoromethylation of diaryliodonium salts with TMSCF3 at room temperature
摘要:
A convenient method for the preparation of trifluoromethylated arenes from the reaction of diaryliodonium salts with TMSCF3 in the presence of CuBF4 center dot(MeCN)(4) and KF at room temperature within 25 min was developed. This reaction provides a valuable complement to the previously established trifluoromethylation methods. (C) 2015 Elsevier B.V. All rights reserved.
Chemoselective Cu-catalyzed synthesis of diverse <i>N</i>-arylindole carboxamides, β-oxo amides and <i>N</i>-arylindole-3-carbonitriles using diaryliodonium salts
Chemoselective copper-catalyzed synthesis of diverse N-arylindole-3-carboxamides, β-oxo amides and N-arylindole-3-carbonitriles from readily accessible indole-3-carbonitriles, α-cyano ketones and diaryliodonium salts has been developed. Diverse N-arylindole-3-carboxamides and β-oxo amides were successfully achieved in high yields under copper-catalyzed neutral reaction conditions, and the addition
Efficient O-Functionalization of Carbohydrates with Electrophilic Reagents
作者:Gergely L. Tolnai、Ulf J. Nilsson、Berit Olofsson
DOI:10.1002/anie.201605999
日期:2016.9.5
iodonium(III) reagents. Both electron‐withdrawing and electron‐donating aryl groups were introduced under ambient conditions and without precautions to exclude air or moisture. Furthermore, the approach was extended both to full arylation of cyclodextrin, and to trifluoroethylation of carbohydrate derivatives. This is the first general approach to introduce traditionally non‐electrophilic groups into
Palladium-catalysed ortho-arylation of carbamate-protected phenols
作者:Robin B. Bedford、Ruth L. Webster、Charlotte J. Mitchell
DOI:10.1039/b916724m
日期:——
The carbamate (–O2CNR2) function is an excellent directing group for palladium-catalysed direct arylation reactions giving both protected or free mono- or di-substituted phenols, as well as an example of a dibenzopyranone, depending on coupling partners (aryl iodides or diaryliodonium salts) and conditions.
<i>N</i>
<sup>1</sup>
‐ and
<i>N</i>
<sup>3</sup>
‐Arylations of Hydantoins Employing Diaryliodonium Salts
<i>via</i>
Copper(I) Catalysis at Room Temperature
reported employing diaryliodonium triflates as aryl source using a copper(I) catalyst. The developed protocol is performable at room temperature and easily scalable. The robustness is confirmed with a wide range of substrate studies of both hydantoins and diaryliodonium salts. Sterically complicated ortho‐substituted diaryliodonium salts are also compatible with the reaction protocol.
作者:Robin B. Bedford、Charlotte J. Mitchell、Ruth L. Webster
DOI:10.1039/c003074k
日期:——
Solvent-free reaction conditions facilitate a range of aromatic C-H functionalisations that traditionally require acidic or disfavoured solvents. These reactions include selective ortho- and meta-arylation of aryl carbamates and anilides and selective halogenation reactions.