The electrochemical cyanation of 1-arylpyrrolidines was carried out in methanol containing sodium cyanide at a platinum anode in a divided cell. The reaction gave the corresponding α-aminonitriles ...
Magnetically recyclable iron oxide nanoparticles for the α-cyanation of amines under acid-free conditions and the formal synthesis of praziquantel
作者:Mahendra Patil、Anant R. Kapdi、A. Vijay Kumar
DOI:10.1039/c5ra10552h
日期:——
A sustainable protocol for the α-cyanation of amines has been developed using cheap and affordable iron oxide nanoparticles under acid free conditions with an easy-to-handle, user-friendly cyanidesource, ethyl cyanoformate. The magnetic property of the iron oxide nanoparticles facilitated their easy recovery and the recovered particles were found to be reusable up to five cycles with no loss of activity
Oxidative Functionalization of Cyclic N-Arylamines with Nitromethane and TMSCN Using the T-HYDRO/t-BuOK System
作者:Mariappan Periasamy、Gunda Rao
DOI:10.1055/s-0036-1590943
日期:2018.2
corresponding iminium ion intermediates via an initial electron transfer process. Tertiary cyclic N-arylamines react with nitromethane in the presence of the tert-butyl hydroperoxide (T-HYDRO)/t-BuOK system to give β-nitroamines in up to 90% yield. When TMSCN is used in place of nitromethane, α-aminonitriles are obtained in up to 96% yield. The method is suitable for several unactivated cyclic arylamine substrates
摘要 在叔丁基氢过氧化物(T-HYDRO)/ t - BuOK体系存在下,环状N-芳基叔胺与硝基甲烷反应生成β-硝基胺,收率高达90%。当使用TMSCN代替硝基甲烷时,以高达96%的产率获得α-氨基腈。该方法适用于几种未活化的环状芳基胺底物。考虑到通过初始电子转移过程形成相应的亚胺离子中间体,这些转化是合理的。 在叔丁基氢过氧化物(T-HYDRO)/ t - BuOK体系存在下,环状N-芳基叔胺与硝基甲烷反应生成β-硝基胺,收率高达90%。当使用TMSCN代替硝基甲烷时,以高达96%的产率获得α-氨基腈。该方法适用于几种未活化的环状芳基胺底物。考虑到通过初始电子转移过程形成相应的亚胺离子中间体,这些转化是合理的。
Controlling One- or Two-Electron Oxidation for Selective Amine Functionalization by Alternating Current Frequency
作者:Disni Gunasekera、Jyoti P. Mahajan、Yanick Wanzi、Sachini Rodrigo、Wei Liu、Ting Tan、Long Luo
DOI:10.1021/jacs.2c02605
日期:2022.6.8
Here, we report a unique electrosynthetic method that enables the selective one-electron oxidation of tertiaryamines to generate α-amino radical intermediates over two-electron oxidation to iminium cations, providing easy access to arylation products by simply applying an optimal alternating current (AC) frequency. More importantly, we have discovered an electrochemical descriptor from cyclic voltammetry
Paired Electrolysis for Decarboxylative Cyanation: 4-CN-Pyridine, a Versatile Nitrile Source
作者:Gadde Sathish Kumar、Prashant S. Shinde、Haifeng Chen、Krishnamoorthy Muralirajan、Rajesh Kancherla、Magnus Rueping
DOI:10.1021/acs.orglett.2c01897
日期:2022.9.9
decarboxylative cyanation of amino acids under paired electrochemical reaction conditions has been developed. 4-CN-pyridine was found to be a new and effective cyanation reagent undercatalyst-freeconditions. Mechanistic studies support a nucleophilic reaction pathway, and the cyanation protocol can be applied to diverse substrates including N,N-dialkyl aniline and indole derivatives.