methyl (E)-4-[(3aS,4S,7R,7aS)-7-hydroxy-7-((4R,5S,E)-5-hydroxy-4-methylhex-2enyl)-2,2-dimethyltetrahydro-3aH-[1,3]dioxolo[4,5-c]pyran-4-yl]-3-methylbut-2-enoate 在
dowex 作用下,
以
甲醇 为溶剂,
反应 96.0h,
以100%的产率得到methyl (E)-3-methyl-4-[(2S,3R,4S,5R)-3,4,5-trihydroxy-5-((4R,5S,E)-5-hydroxy-4-methylhex-2enyl)tetrahydro-2H-pyran-2-yl]but-2-enoate