2-[4,4-dimethyl-2-[(5-oxo-2H-furan-4-yl)methyl]cyclopentylidene]propanedinitrile 在
magnesium(II) perchlorate 作用下,
以
乙腈 为溶剂,
生成 2-((3aS,3bR,6aS,7aS)-5,5-Dimethyl-1-oxo-octahydro-pentaleno[1,2-c]furan-3b-yl)-malononitrile 、 2-((3aR,3bR,6aS,7aR)-5,5-Dimethyl-1-oxo-octahydro-pentaleno[1,2-c]furan-3b-yl)-malononitrile