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The rhodium(I)-catalyzed conjugate addition of aryl- or 1-alkenylboronic acids to enones was carried out in high yields at 50 °C in an aqueous solvent. A combination of (acac)Rh(CO)2 and dppb was recognized to be highly effective for the addition to acyclic and cyclic enones.
Sakai et al. (Mon,) studied this question.