、
2,2-二甲氧基丙烷 在
4-甲基苯磺酸吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 15.0h,
以191 mg的产率得到(3S,4S,E)-6-[(4R,6R)-6-{[(4R,6S)-6-{(R)-3-[(2R,4R,6R)-6-{[(4R,5S,6S)-6-allyl-2,2,5-trimethyl-1,3-dioxan-4-yl]methyl}-2-(4-methoxyphenyl)-1,3-dioxan-4-yl]-2-(4-methoxybenzyloxy)propyl}-2,2-dimethyl-1,3-dioxan-4-yl]methyl}-2,2-dimethyl-1,3-dioxan-4-yl]-2,4-dimethylhex-5-en-3-ol