Novel phosphine‐imidazolium salts 2 have been synthesized and successfully used in palladium‐catalyzed Suzuki cross‐coupling. A combination of 0.05 mol % of [Pd(η‐C3H5)Cl]2 and 0.1 mol % of 2b in the presence of 2 equivs. of K3PO4 as base provided coupling products in excellent yields in the reaction of aryl bromides and chlorides with aryl boronic acids.
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Wang et al. (2004) studied this question.
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