diethyl 2-[(E)-2-methyl-6-oxohept-2-enyl]-2-[(E)-3-phenylprop-2-enyl]propanedioate 、
三甲基硅烷化重氮甲烷 在
正丁基锂 作用下,
以
四氢呋喃 为溶剂,
生成 diethyl (3aS,6aS,7S,7aS)-3a,4-dimethyl-7-phenyl-3,3a,6,6a,7,7a-hexahydro-1H-cyclopenta[a]pentalene-2,2(5H)-dicarboxylate 、 diethyl (3aS,6aR,7R,7aS)-3a,6a-dimethyl-7-phenyl-3,3a,6,6a,7,7a-hexahydro-1H-cyclopenta[a]pentalene-2,2(5H)-dicarboxylate