Synthetic Access to Ring-Expanded N-Heterocyclic Carbene (RE-NHC) Copper Complexes and Their Performance in Click Chemistry

The facile syntheses of ring-expanded N-heterocyclic carbene (RE-NHC) copper(I) halide complexes are reported. method makes use a weak inorganic base in green solvent. reaction times can be greatly reduced by this weak-base route under microwave irradiation. easy access to these permits an evaluation the catalytic activity and profiling [Cu(RE-NHC)X] Huisgen 1,3-cycloaddition reaction.