(3E,3aS,4R,6R,7S,7aR) methyl 3a,7-bis<(t-butyldimethylsilyl)oxy>-6-hydroxy-3-iodomethylidene-6-methyl-octahydrobenzofuran-4-carboxylate 在
氯化亚砜 作用下,
以
吡啶 为溶剂,
反应 2.0h,
以70%的产率得到(3E,3aS,4R,7aR) methyl 3a,7-bis<(t-butyldimethylsilyl)oxy>-3-iodomethylidene-6-methyl-2,3,3a,4,5,7a-hexahydrobenzofuran-4-carboxylate