Indazolin-3-ylidenes (Indy*): easily accessible, sterically-hindered indazole-derived N-heterocyclic carbenes and their application in gold catalysis

We report novel sterically-hindered ligands with strong σ-donation from the C3-indazole carbene center and flexible N-substitution with a 2,6-bis(diphenylmethyl)aryl group that extends beyond the metal center in non-classical N-heterocyclic carbenes.