1-acetyl-2-methyl-1-cyclopentene N,N-dimethylhydrazone 在
四氯化钛 、
magnesium 作用下,
以
四氢呋喃 为溶剂,
生成 (1S,3aS,6aR)-1,6a-Dimethyl-1-(2-methyl-cyclopent-1-enyl)-1,3a,4,5,6,6a-hexahydro-cyclopenta[c]pyrrole 、 (1S,3aR,6aS)-1,6a-Dimethyl-1-(2-methyl-cyclopent-1-enyl)-1,3a,4,5,6,6a-hexahydro-cyclopenta[c]pyrrole