Abstract
| - Expeditious CuI-catalyzed conjugate 1,4-additionof bromo[2-(1,3-dioxolan-2-yl)ethyl]magnesium to the five-,six-, seven-, and eight-membered α,β-cycloalkenones isdescribed. The reaction times are decreased dramaticallycompared to CuBr−(CH3)2S catalysis. The resulting ketoacetals were subsequently cyclized to bicyclic β-hydroxyketones and α,β-enones, followed by further transformations.
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