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Free keywords:
Ligand design; N-heterocyclic carbene; Suzuki-Miyaura cross-coupling
Abstract:
The ready synthesis of differently substituted 2H-imidazo[1,5-a]pyridin-4-ium bromides is reported. These salts are precursors for a new class of N-heterocyclic carbene ligands. As a consequence of their bicyclic geometry, these ligands are capable of influencing the coordination sphere of a carbene bound metal. The usefulness of these ligands was demonstrated in the palladium-catalyzed Suzuki–Miyaura cross-coupling of sterically hindered aryl chlorides.
