N-苯基双(三氟甲烷磺酰)亚胺   、                                                                                      
methyl (1'S,4'aS,8'aS)-4'a-methyl-2'-oxospiro[1,3-dioxolane-2,5'-3,4,6,7,8,8a-hexahydro-1H-naphthalene]-1'-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 sodium hydride                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙二醇二甲醚   、                                                                                         mineral oil                                                                                  为溶剂,
                                                                                                                                                    反应 6.0h,
                                                                                                                以1.49 g的产率得到methyl (4a'R,8a'S)-8a'-methyl-6'-(trifluoromethylsulfonyloxy)-3',4',4a',7',8',8a'-hexahydro-2'H-spiro[[1,3]dioxolane-2,1'-naphthalene]-5'-carboxylate