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| - Suzuki−Miyaura Cross-Coupling Reactions of PotassiumAlkenyltrifluoroborates
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| Abstract
| - We have previously reported that the palladium-catalyzed cross-coupling reaction of air-stablepotassium alkenyltrifluoroborates with aryl halides and triflates proceeds readily with good yields.Recent progress in outlining the scope and limitations of such reactions is described herein. Thepalladium-catalyzed cross-coupling reaction of potassium alkenyltrifluoroborates with aryl andheteroaryl halides and triflates proceeds readily with moderate to excellent yields. The alkenylcross-coupling reaction can generally be effected using 2 mol % of PdCl2(dppf)·CH2Cl2 as catalystin i-PrOH−H2O in the presence of t-BuNH2 as the base. A variety of functional groups are toleratedin both partners, and the process is stereospecific with regard to the alkenyltrifluoroborate startingmaterial.
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