、
2,2-二甲氧基丙烷 在
对甲苯磺酸 作用下,
反应 18.0h,
生成 6(S)-<1(R)-methyl-2-<(tert-butyldiphenylsilyl)oxy>ethyl>-4(R)-<1(R)-methyl-1-(2,2,5(S)-trimethyldioxan-4(S)-yl)methyl>-2,2,5(S)-trimethyl-1,3-dioxane 、
6(R)-<1(R)-methyl-2-<(tert-butyldiphenylsilyl)oxy>ethyl>-4(R)-<1(R)-methyl-1-(2,2,5(S)-trimethyldioxan-4(S)-yl)methyl>-2,2,5(S)-trimethyl-1,3-dioxane