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The combination of Pd(dba)2 and bis(2-di-tert-butylphosphinophenyl)ether has proven to be efficient for the cross-coupling of pinacolborane with aryl bromides and chlorides. The substrate scope is broad and the present system enables the synthesis of ortho-, meta-, and para-substituted electron-rich and -deficient arylboronates.
Murata et al. (Mon,) studied this question.