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

Duenren Hou, Tingchun Kuan, YuKai Li, Richmond Lee, Kuo-Wei Huang

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

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. © 2010 Elsevier Ltd. All rights reserved.
Original languageEnglish (US)
Pages (from-to)9415-9420
Number of pages6
JournalTetrahedron
Volume66
Issue number48
DOIs
StatePublished - Nov 2010

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry
  • Drug Discovery

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