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Double allylation of carboxylic esters with allyl bromide was performed successfully by the action of aluminum metal and a catalytic amount of lead(II) bromide in tetrahydrofuran (THF). The proper choice of solvent is essential for the reaction; thus, among the examined solvents, ethers, e.g. THF, 1,2-dimethoxyethane (DME), and diethyl ether, could be successfully used for the double allylation but...
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