endo-cis-1,6,7,8-Tetrachlor-9,9-dimethoxy-Δ
3,7-tricyclo<4.2.1.0
2,5>nonadien 、
2-methyl-3,4,5-triphenylcyclopentadienone 以
xylene 为溶剂,
反应 2.0h,
以60%的产率得到rac-(1R,4S,4aR,4bS,5S,8S,8aS,8bR)-1,2,3,4-tetrachloro-10,10-dimethoxy-5-methyl-6,7,8-triphenyl-1,4,4a,4b,5,8,8a,8b-octahydro-1,4:5,8-dimethanobiphenylen-9-one