Abstract
C-H functionalization of undecahalogenated carborane anions, [HCB11X11-] (X = Cl, Br, I), is performed with Cs2CO3 in acetonitrile. We show that the requisite Cl, Br and I carborane dianions can all be efficiently accessed with Cs2CO3. The utilization of Cs2CO3 eliminates the complications associated with competing E2 elimination reactions providing an efficient, more functional group tolerant, and broader scope than previously reported. The ensuing functionalized cages provide potential synthons for constructing advanced materials and other molecular architectures for various applications.
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