dimethyl 1,2,3,3a,6,7,8,10a-octahydro-1,2,3:6,7,8-dimethenocyclopentacyclononene-4,10-dicarboxylate 以
苯 为溶剂,
反应 2.0h,
以77%的产率得到dimethyl (1α,1aβ,1bβ,1cβ,3aβ,4α,6aβ,6bβ)-1,1a,1b,1c,3a,4,6a,6b-octahydro-1,4-ethenocyclobuta
cyclopropa<3,4>cyclobuta<1,2-a>cycloheptene-5,7-dicarboxylate