2-(三甲硅基)乙醇 、
(3E,3aS,4R,7R,7aR) methyl 3a-acetoxy-7-<(t-butyldimethylsilyl)oxy>-3-iodomethylidene-6-methyl-2,3,3a,4,7,7a-hexahydrobenzofuran-4-carboxylate 在
titanium(IV) isopropylate 作用下,
反应 6.0h,
以92%的产率得到(3E,3aS,4R,7R,7aR) <2-(trimethylsilyl)ethyl>7-<(t-butyldimethylsilyl)oxy>-3a-hydroxy-3-iodomethylidene-6-methyl-2,3,3a,4,7,7a-hexahydrobenzofuran-4-carboxylate