(2R,3S,4R,6R,8E)-2-((2S,4R,5S,6S)-6-<(1R,2S)-2-Hydroxy-1-methylbutyl>-2-(p-methoxyphenyl)-5-methyl-1,3-dioxan-4-yl)-3-hydroxy-4,6,8-trimethyl-8-undecen-5-one 在
吡啶 、
chromium(VI) oxide 作用下,
以
二氯甲烷 为溶剂,
反应 0.25h,
以61%的产率得到(2S,4RS,6R,8E)-2-((2S,4S,5S,6R)-2-(p-Methoxyphenyl)-5-methyl-6-<(1S)-1-methyl-2-oxobutyl>-1,3-dioxan-4-yl)-4,6,8-trimethyl-8-undecen-3,5-dione