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