Spiro<(1α,3β,6β,7β,8α)-tetracyclo<6.2.2.0
1,7.0
3,6>dodeca-4,9,11-trien-2,3'-tetracyclo<3.2.0.0
2,7.0
4,6>heptan>-3,4,9,10-tetracarbonsaeure-tetramethylester                                                                                                                                                                                              以
                                                                                         
乙腈                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以75%的产率得到D,L-(1R*,7R*,8R*)-Spiro
1,3.02,5.04,6.08,11>dodec-9-en-12,3'-tetracyclo<3.2.0.02,7.04,6>heptan>-2,5,10,11-tetracarbonsaeure-tetramethylester