Abstract
The addition of lithium dimethylcuprate to allenic phosphine oxide or carbonyl compounds leads, via I-2 addition to the activated carbon—carbon double bond, to stable organocopper(I) species including methyl and functional allyl groups. We have studied the reactivity of such species with two models. In their reaction with an electrophile they transfer, most often specifically, either the methyl or the allyl group, and in this latter case the reaction is also most often stereo- and regio-selective. At this time it is however difficult to rationalise these observations but some interesting applications may be envisaged for synthetic purposes.
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