(3E,3aS,6R,7S,7aR) methyl 3a-<(t-butyldimethylsilyl)oxy>-3-iodomethylidene-6,7-isopropylidenedioxy-6-methyl octahydrobenzofuran-4-carboxylate 在
对甲苯磺酸 作用下,
以
甲醇 为溶剂,
反应 12.0h,
以45%的产率得到(3E,3aS,4R,6R,7S,7aR) methyl 3a-<(t-butyldimethylsilyl)oxy>-6,7-dihydroxy-3-iodomethylidene-6-methyl-octahydrobenzofuran-4-carboxylate