Journal
TETRAHEDRON
Volume 61, Issue 26, Pages 6207-6217Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2005.03.115
Keywords
ligand design; N-heterocyclic carbene; Suzuki-Miyaura cross-coupling
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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. (c) 2005 Elsevier Ltd. All rights reserved.
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