(Z)-dimethyl 2-(4-benzylidenehept-6-ynyl)malonate 在
manganese(III) triacetate dihydrate 、 copper(II) bis(trifluoromethanesulfonate) 作用下,
以
乙腈 为溶剂,
生成 methyl 3-oxo-1-phenyl-6a-(prop-2-ynyl)hexahydro-1H-cyclopenta[c]furan-3a-carboxylate 、 methyl 3-oxo-1-phenyl-6a-(prop-2-ynyl)hexahydro-1H-cyclopenta[c]furan-3a-carboxylate