(5S,7R,9S,12R,13S,14S)-15-((2S,3R,7R,E)-7-acetoxy-2-((4S,6R)-2,2-dimethyl-6-(pent-4-enyl)-1,3-dioxan-4-yl)-5-methyldec-4-en-3-yloxy)-13-(4-methoxybenzyloxy)-2,12,14-trimethyl-15-oxopentadec-1-ene-5,7,9-triyl triacetate 在
4-甲基苯磺酸吡啶 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以82%的产率得到(5S,7R,9S,12R,13S,14S)-15-((4R,8R,9S,10S,12R,E)-4-acetoxy-10,12-dihydroxy-6,9-dimethylheptadeca-6,16-dien-8-yloxy)-13-(4-methoxybenzyloxy)-2,12,14-trimethyl-15-oxopentadec-1-ene-5,7,9-triyl triacetate