Abstract
The effect of silanes as additives in the copper-catalyzed conjugate alkylation of enones by various organoaluminium reagents was investigated. TMSCl led to significant lower amounts of CuBr catalyst needed in the reaction of trimethylaluminium with enones, but was unsuccessful in the case of organoaluminium compounds of the formula Me 2AlY (Y = Cl, OR). Me 2AlOEt turned out to be a useful reagent for methylation without support of additives.
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