rel-(1S,5S,8S)-8-iodo-1-(3-methyl-3-butenyl)-5-methoxy-6-oxabicyclo<3.2.1>oct-2-en-7-one                                                                                                                                                              在
                                                                                                                                                                                 
偶氮二异丁腈   、                                                                                                  
三正丁基氢锡                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 rel-(1R,4aS,7R,8aR)-1,5,6,7,8,8a-hexahydro-1-methoxy-7-methyl-2H-1,4a-(epoxymethano)naphthalen-9-one   、                                                                                             rel-(1R,4aS,7S,8aR)-1,5,6,7,8,8a-hexahydro-1-methoxy-7-methyl-2H-1,4a-(epoxymethano)naphthalen-9-one