<1S-<1α(αS,γR*),5β,6β(4Σ
*,6R
*)>>-6-<2-<6-<2-<<(1,1-dimethylethyl)diphenylsilyl>oxy>ethyl>-2,2-dimethyl-1,3-dioxan-4-yl>ethyl>-α,5-dimethyl-2-oxo-γ-<(triethylsilyl)oxy>-3-cyclohexene-1-butanal 在
titanium(III) chloride 作用下,
以
乙二醇二甲醚 为溶剂,
以86%的产率得到<1S-<1α,3α,7β,8β(4Σ
*,6R
*)8aβ>>-<<8-<2-<6-<2-<<(1,1-dimethylethyl)diphenylsilyl>oxy>ethyl>-2,2-dimethyl-1,3-dioxan-4-yl>ethyl>-1,2,3,7,8,8a-hexahydro-3,7-dimethyl-1-naphthalenyl>oxy>triethylsilane