Electronic effects of ruthenium-catalyzed [3+2]-cycloaddition of alkynes and azides

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50700

Title:	Electronic effects of ruthenium-catalyzed [3+2]-cycloaddition of alkynes and azides
Authors:	Hou,DR;Kuan,TC;Li,YK;Lee,R;Huang,KW
Contributors:	化學學系
Keywords:	EFFECTIVE CORE POTENTIALS;MOLECULAR-ORBITAL METHODS;GAUSSIAN-TYPE BASIS;CLICK-CHEMISTRY;ORGANIC-MOLECULES;TERMINAL ALKYNES;CYCLOADDITION;1,2,3-TRIAZOLES;FORMULA;SCOPE
Date:	2010
Issue Date:	2012-03-27 18:08:13 (UTC+8)
Publisher:	國立中央大學
Abstract:	A combined experimental and theoretical study of ruthenium-catalyzed azide-alkyne cycloaddition (RuAAC) reactions is presented and various electronic analyses were conducted to provide a basis in understanding the observed regioselectivity of the 1,2,3-triazole products. Computational studies using density functional theory (DFT) and atoms in molecules quantum theory (AIM) further yield fresh details on the electronic factors that determine the regioselectivity in the RuAAC. It is found that the formation of 1,2,3-triazole products is irreversible and from the Hammett study, the pathway involving a vinyl cationic intermediate is ruled out. The electronic effect favors the formation of 5-electron-donating-group substituted-1,2,3-trizoles. (C) 2010 Elsevier Ltd. All rights reserved.
Relation:	TETRAHEDRON
Appears in Collections:	[Department of Chemistry] journal & Dissertation

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