Intramolecular Imidoylative Heck Reaction: Synthesis of Cyclic Ketoimines from Functionalized Isocyanide
作者:Jian Wang、Shi Tang、Qiang Zhu
DOI:10.1021/acs.orglett.6b01174
日期:2016.7.1
Efficient access to five- to seven-membered cyclic ketoimines, through palladium-catalyzed intramolecular imidoylative Heckreaction of alkene-containing isocyanides, has been developed. Consecutive isocyanide and alkene insertion into aryl or alkyl Pd(II) intermediates takes place in this process. No byproduct derived from monoinsertion or reversed sequence is detected.
A palladium-catalyzed domino process for the quick assembly of tricyclic-fused heterocycles starting from aryl iodides and functionalized isocyanides containing a disubstituted terminal alkene has been developed. The process is triggered by intermolecular isocyanide insertion, followed by Heck-type carbopalladation of the intramolecular alkene moiety and subsequent C(sp2)–H activation. Moreover, an
A cation-directed two-component cascade approach to enantioenriched pyrroloindolines
作者:Jamie R. Wolstenhulme、Alex Cavell、Matija Gredičak、Russell W. Driver、Martin D. Smith
DOI:10.1039/c4cc06683a
日期:——
A cascade approach to complex pyrroloindolines bearing all-carbon quaternary stereocentres has been developed. This two-component process uses a chiral ammonium salt to control diastereo- and enantioselectivity in the addition of isocyanides to functionalized alkenes to afford pyrroloindolines with up to three stereocentres. A mechanistic proposal involving intramolecular hydrogen bond activation of the isocyanide is described.
Isocyanides as Influenza A Virus Subtype H5N1 Wild-Type M2 Channel Inhibitors
作者:Shuwen Wu、Jing Huang、Sabrina Gazzarrini、Si He、Lihua Chen、Jun Li、Li Xing、Chufang Li、Ling Chen、Constantinos G. Neochoritis、George P. Liao、Haibing Zhou、Alexander Dömling、Anna Moroni、Wei Wang
DOI:10.1002/cmdc.201500318
日期:2015.11
amines such as amantadine are well-characterized M2channel blockers, useful for treating influenza. Herein we report our surprising findings that charge-neutral, bulky isocyanides exhibit activities similar to--or even higher than--that of amantadine. We also demonstrate that these isocyanides have potent growth inhibitory activity against the H5N1virus. The -NH2 to -N≡C group replacement within current
The formation of isocyanides from formamides using XtalFluor-E, [Et2NSF2]BF4, is presented. A wide range of formamides can be used to produce the corresponding isocyanides in up to 99% yield. In a number of cases, the crude products showed good purity (generally >80% by NMR) allowing to be used directly in multi-component reactions. (C) 2014 Elsevier Ltd. All rights reserved.