The synthesis and catalytic activity of pyridine-fused
triazolylidene
as a novel abnormal N-heterocyclic carbene (aNHC) ligand is described. The evaluation of physical properties
using X-ray crystallographic analysis and infrared spectroscopy revealed
that these triazolylidenes have a high electron-donating ability toward
the metal center. The application of this triazolylidene to the palladium-catalyzed
cross-coupling of chloroarenes and nitroarenes with arylboronic acids
showcased its ability to activate C–Cl and C–NO2 bonds.