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

Linus P. Bheeter , Duo Wei , Vincent Dorcet (1) , Thierry Roisnel (1) , Prasenjit Ghosh (2) , Jean-Baptiste Sortais (1) , Christophe Darcel (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 IIT Bombay - Indian Institute of Technology Bombay

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.

Domaines: Chimie

Linus P. Bheeter, Duo Wei, Vincent Dorcet, Thierry Roisnel, Prasenjit Ghosh, et al.. 1,2,4-Triazole-Based N-Heterocyclic Carb-ene Nickel Complexes - Synthesis and Catalytic Application. European Journal of Inorganic Chemistry, 2015, 2015 (31), pp.5226-5231. ⟨10.1002/ejic.201500852⟩. ⟨hal-01216291⟩