(3aR,4R,5R,9bS)-4,5-dihydroxy-7-[2-(3-hydroxy-4-methoxyphenyl)ethyl]-2,2-dimethyl-3a,4,5,9b-tetrahydro-[1,3]dioxolo[4,5-f]chromen-9-one 、
乙酸酐 在
吡啶 、
4-二甲氨基吡啶 作用下,
反应 5.0h,
以9.6mg的产率得到[(3aS,4S,5R,9bS)-5-acetyloxy-7-[2-(3-acetyloxy-4-methoxyphenyl)ethyl]-2,2-dimethyl-9-oxo-3a,4,5,9b-tetrahydro-[1,3]dioxolo[4,5-f]chromen-4-yl] acetate