4,6,7,15,16-pentakis(acetyloxy)-21,22-epoxy-18,20-dihydroxy-22-methoxycarbonyl[6α,7α,15β,16β,21β,22β]-D:A-Friedo-2,3,27,30-tetranor-24-oxaoleanane 在
sodium acetate 、
pyridinium chlorochromate 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以78%的产率得到4,6,7,15,16-pentakis(acetyloxy)-21,22-epoxy-18-hydroxy-20-oxo-22-methoxycarbonyl[6α,7α,15β,16β,21β,22β]-D:A-Friedo-2,3,27,30-tetranor-24-oxaoleanane