Highly Efficient Palladacycle/Dihydroimidazolium Chloride System for the Suzuki‐Miyaura Cross‐Coupling of Aryl Halides (I, Br, Cl) with Arylboronic Acids
2010
A combination of a tertiary amine-based palladacycle and an N-heterocyclic carbene ligand precursor (1, N,N-bis-mesityl-4,5-dihydroimidazolium chloride) has been applied to catalyze the Suzuki-Miyaura cross-coupling of aryl halides with arylboronic acids. The substrate scope is general: a variety of electron rich and deficient aryl halides (I, Br, Cl) and arylboronic acids were found to undergo the cross-coupling reaction in good to excellent yields at low catalyst loading of 0.01–1 mol%.
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