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1,2,4-Triazole-Based N-Heterocyclic Carb-ene Nickel Complexes - Synthesis and Catalytic Application

Authors
  • Bheeter, Linus P.
  • Wei, Duo
  • Dorcet, Vincent
  • Roisnel, Thierry
  • Ghosh, Prasenjit
  • Sortais, Jean-Baptiste
  • Darcel, Christophe
Publication Date
Jan 01, 2015
Source
HAL-UPMC
Keywords
Language
English
License
Unknown
External links

Abstract

Four nickel complexes bearing 1,2,4-triazole-based N-heterocyclic carbene backbones and a cyclopentadienyl ligand were prepd. from the corresponding 1,2,4-triazolium salts and nickelocene in THF (THF) under reflux. The obtained complexes were fully characterized, including by X-ray diffraction anal. They were then used as catalysts (5 mol-%) for the borylation of aryl bromide derivs. with bis(pinacolato)diboron in the presence of Cs2CO3 as the base in THF at 70 °C for 20 h to form the corresponding borylated products in moderate yields.

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