(3E,3aS,6S,7S,7aR) methyl 3a-<(t-butyldimethylsilyl)oxy>-3-iodomethylidene-6,7-isopropylidenedioxy-6-methyl octahydrobenzofuran-4-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
2,6-二甲基吡啶   、                                                                                                  montmorillonite K-10                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃   、                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 8.0h,
                                                                                                                生成                                                 
(3E,3aS,4R,6S,7S,7aR) methyl 3a,7-bis<(t-butyldimethylsilyl)oxy>-6-hydroxy-3-iodomethylidene-6-methyl-octahydrobenzofuran-4-carboxylate