Transition-Metal-Free<i>N</i>-Arylation of Pyrazoles with Diaryliodonium Salts
作者:Zsombor Gonda、Zoltán Novák
DOI:10.1002/chem.201502995
日期:2015.11.16
developed for the N‐arylation of pyrazoles using diaryliodoniumsalts. The transformation does not require any transition‐metal catalyst and provides the desired N‐arylpyrazoles rapidly under mild reaction condition in the presence of aqueous ammonia solution as a mild base without the use of inert atmosphere. The chemoselectivity of unsymmetric diaryliodoniumsalts was also explored with large number
Cu-catalyzed arylation of 1-acyl-1H-1,2,3-Benzotriazoles via C–N activation
作者:Wenying Zhang、Yangyang Wang、Xiangru Jia、Zhengyin Du、Ying Fu
DOI:10.1016/j.jorganchem.2019.05.013
日期:2019.9
An efficient copper-catalyzed arylationreaction of 1-acyl-1H-1,2,3-benzotriazoles with diaryliodonium salts via C–N activation is explored. The reaction is conducted regioselectively to form 1-aryl-1H-1,2,3-benzotriazoles in MeCN at 80 °C in the presence of cesium carbonate. 29 examples are given with the product yield of up to 84%. The probable reaction mechanism is proposed.
通过CN活化研究了1-酰基-1 H -1,2,3-苯并三唑与二芳基碘鎓盐的有效铜催化芳基化反应。在碳酸铯存在下,于80℃在MeCN中区域选择性地进行反应以形成1-芳基-1 H -1,2,3-苯并三唑。给出了29个实例,产品收率高达84%。提出了可能的反应机理。
The synthesis of [18F]fluoroarenes from the reaction of cyclotron-produced [18F]fluoride ion with diaryliodonium salts
作者:Aneela Shah、Victor W. Pike、David A. Widdowson
DOI:10.1039/a802349b
日期:——
Diaryliodonium salts have been shown to react with fluoride ion at 80 °C in acetonitrile to generate aryl fluorides. The regioselectivity is controlled electronically and by the bulk of the ortho-substituents on the rings, with the latter the dominant factor such that electron-rich rings can be fluorinated. ortho-Substituted aryl fluorides can be selectively produced from unsymmetrical diaryliodonium salts. The
Efficient and General One-Pot Synthesis of Diaryliodonium Triflates: Optimization, Scope and Limitations
作者:Marcin Bielawski、Mingzhao Zhu、Berit Olofsson
DOI:10.1002/adsc.200700373
日期:2007.12.10
diaryliodonium triflates have been synthesized from both electron-deficient and electron-rich arenes and aryl iodides with mCPBA and triflic acid. A thorough investigation of the optimization, scope and limitations has resulted in an improved one-pot protocol that is fast, high-yielding, and operationally simple. The reaction has been extended to the direct synthesis of symmetrical iodonium salts from
A reagent prepared from a 1:2 molar ratio of (diacetoxy)iodobenzene [PhI(OAc)2] and trifluoromethanesulfonic acid (TfOH) reacts with aromatic compounds to give diaryliodonium triflates in fairly good yields. The high reactivity and high para selectivity of the reagent [PhI(OAc)2-2TfOH] are described.