3-(6(S)-methyl-5-oxo-4-oxa-tricyclo[5.2.1.02,6]dec-8-en-3(R)-yloxymethylene)-3,3a(S),4,5,6,7,8,8b(R)-octahydroindeno[1,2-b]furan-2-one                                                                                                                                                                                              以
                                                                                         
邻二氯苯                                                                                  为溶剂,
                                                                                                                                                    反应 6.0h,
                                                                                                                以31%的产率得到3-(4-methyl-5-oxo-2,5-dihydrofuran-2(R)-yloxymethylene)-3,3a(S),4,5,6,7,8,8b(R)-octahydroindeno[1,2-b]furan-2-one