ChemInform Abstract: Dinuclear Chiral Vanadium Catalysts for Oxidative Coupling of 2-Naphthols via a Dual Activation Mechanism

ChemInform ◽  
2009 ◽  
Vol 40 (4) ◽  
Author(s):  
Shinobu Takizawa ◽  
Tomomi Katayama ◽  
Hiroaki Sasai
Keyword(s):  
Oxidative Coupling ◽  
Activation Mechanism ◽  
Vanadium Catalysts ◽  
Dual Activation

Liquid-phase oxidative coupling of 2-naphthol by vanadium catalysts supported on MCM-41

2005 ◽  
Vol 231 (1-2) ◽  
pp. 235-240 ◽  
Author(s):  
Takahiro Ikeda ◽  
Naohisa Misawa ◽  
Yuichi Ichihashi ◽  
Satoru Nishiyama ◽  
Shigeru Tsuruya
Keyword(s):  
Liquid Phase ◽  
Oxidative Coupling ◽  
Vanadium Catalysts ◽  
Mcm 41

Insights into the Dual Activation Mechanism Involving Bifunctional Cinchona Alkaloid Thiourea Organocatalysts: An NMR and DFT Study

2012 ◽  
Vol 77 (21) ◽  
pp. 9813-9825 ◽  
Author(s):  
Jun-Ling Zhu ◽  
Yong Zhang ◽  
Chong Liu ◽  
An-Min Zheng ◽  
Wei Wang
Keyword(s):  
Cinchona Alkaloid ◽  
Dft Study ◽  
Activation Mechanism ◽  
Dual Activation

scholarly journals An Enantioconvergent Benzylic Hydroxylation Using a Chiral Aryl Iodide in a Dual Activation Mode

2020 ◽  
Author(s):  
Ayham Abazid ◽  
Nils Clamor ◽  
Boris Nachtsheim
Keyword(s):  
Activation Mechanism ◽  
Second Step ◽  
Chiral Ligand ◽  
Aryl Iodide ◽  
Radical Bromination ◽  
Benzylic Hydroxylation ◽  
Dual Activation

In this article we describe an enantioselective hydroxylation of benzylic C-H bonds with a unique activation mechanism. A chiral aryl iodide catalyst initially acts as precursor for a brominating reagent which subsequently brominates the benzylic C-H bond in a non-stereoselective fashion through a radical bromination. In the second step of this transofrmation, the same catalyst acts as a chiral ligand in a Cu-catalyzed enantioconvergent substitution. We present a broad substrate scope and an intial mechanistic proposal based on a plethora of control experiments.<br>

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