(3E,3aS,4R,6S,7S,7aR) methyl 3a-acetoxy-3-iodomethylidene-6,7-isopropylidenedioxy-6-methyl octahydrobenzofuran-4-carboxylate 在
montmorillonite K-10 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以78%的产率得到(3E,3aS,4R,6S,7S,7aR) methyl 3a-acetoxy-6,7-dihydroxy-3-iodomethylidene-6-methyl octahydrobenzofuran-4-carboxylate