Solvent mediated reactions of diethylhex-1-ynylaluminium with 3,4-epoxycyclopentene

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Abstract
Reaction of diethylhex-1-ynylalumnium with 3,4-epoxycyclopentene in an ether solvent resulted in predominant opening of the epoxide ring by attack at the allylic carbon, while use of a hydrocarbon solvent led to rearrangement of the epoxide to cyclopent-3-enone, followed by further reaction of the carbonyl group.