Methyl <4R-<4α,6α(1αS*,2α,6β)>>-<6-<2-(2-methyl-5-methylene-6-phenyl-3-cyclohexen-1-yl)ethyl>-2,2-dimethyl-1,3-dioxan-4-yl>ethanoate 在
对甲苯磺酸 作用下,
以
苯 为溶剂,
反应 6.0h,
以60%的产率得到<4R-trans-<1αS*,2α,6β>>-6-<2-(2-Methyl-5-methylene-6-phenyl-3-cyclohexen-1-yl)ethyl>tetrahydro-4-hydroxy-2H-pyran-2-one