(E)-dimethyl 2-(5-(4-bromophenyl)pent-4-enyl)malonate 在
manganese(III) triacetate dihydrate 、 copper(II) bis(trifluoromethanesulfonate) 作用下,
以
乙腈 为溶剂,
生成 (1S,3aS,6aR)-methyl 1-(4-bromophenyl)-3-oxohexahydro-1H-cyclopenta[c]furan-3a-carboxylate 、 (1R,3aS,6aR)-methyl 1-(4-bromophenyl)-3-oxohexahydro-1H-cyclopenta[c]furan-3a-carboxylate