Au-iClick mirrors the mechanism of copper catalyzed azide-alkyne cycloaddition (CuAAC).
Au-iClick mirrors the mechanism of copper catalyzed azide-alkyne cycloaddition (CuAAC).
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Au-iClick 反映了铜催化叠氮化物-炔环加成 (CuAAC) 的机理。
DOI:
10.1039/c5dt02405f
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发表时间:
2015
影响因子:
4
通讯作者:
A. Veige
中科院分区:
文献类型:
--
作者:
A. R. Powers;I. Ghiviriga;K. Abboud;A. Veige
This report outlines the investigation of the iClick mechanism between gold(i)-azides and gold(i)-acetylides to yield digold triazolates. Isolation of digold triazolate complexes offer compelling support for the role of two copper(i) ions in CuAAC. In addition, a kinetic investigation reveals the reaction is first order in both Au(i)-N3 and Au(i)-C[triple bond, length as m-dash]C-R, thus second order overall. A Hammett plot with a ρ = 1.02(5) signifies electron-withdrawing groups accelerate the cycloaddition by facilitating the coordination of the second gold ion in a π-complex. Rate inhibition by the addition of free triphenylphosphine to the reaction indicates that ligand dissociation is a prerequisite for the reaction. The mechanistic conclusions mirror those proposed for the CuAAC reaction.
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影响因子:
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作者:
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通讯作者:
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影响因子:
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