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Double-Helical Ag–S Rod-Based Porous CoordinationPolymers with Double Activation: σ-Active and π-ActiveFunctions

机译:双螺旋Ag–S杆基多孔配位双重活化的聚合物:σ-活性和π-活性功能

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摘要

As common coinage metals, silver and silver compounds have very rich application in the organic catalytic reaction. Immobilization of silver compounds on heterogeneous media is the most common way used in industrial catalytic reactions. In this work, we designed and synthesized a new heterogeneous porous silver catalyst, with in situ-formed Ag–S rods as connecting nodes and thiosemicarbazide-functionalized linear ligands, used in both σ- and π-catalytic transformations. Strong Ag–S bonds bypassed the loss of noble silver elements and inhibited the formation of nonporous silver particles which always led to the decrease of yields in homogenous reactions. Furthermore, various derivatives of propargylamines and phenylacetylenes were applied as both σ and π-active substrates with moderate to good yields.
机译:作为普通的造币金属,银和银化合物在有机催化反应中具有非常丰富的应用。将银化合物固定在非均相介质上是工业催化反应中最常用的方法。在这项工作中,我们设计并合成了一种新的非均相多孔银催化剂,该催化剂以原位形成的Ag-S棒为连接节点,并由硫代氨基脲官能化的线性配体用于σ和π催化转化。牢固的Ag-S键绕过了贵金属元素的损失,并抑制了无孔银颗粒的形成,这总是导致均相反应产率的降低。此外,炔丙基胺和苯乙炔的各种衍生物被用作σ和π活性底物,产率中等至良好。

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