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A combinative iron(III) chloride/sodium iodide system was found to be very efficient for the iododemetallation of both organotrifluoroborates and tributyl(aryl)stannanes. A variety of functional groups tolerate the mild reaction conditions.
In the presence of iron trichloride, the hydrolysis of potassium organotrifluoroborates occurs smoothly at room temperature to afford the corresponding organoboronic acids in good to excellent yields. The hydrolysis is effective for aryltrifluoroborates as well as alkenyl- and alkyl-trifluoroborates.
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