cymarin-19-carboxylic acid 在
lead(IV) tetraacetate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 28.0h,
生成 (3S,5S,8R,9S,10S,13R,14S,17R)-14-hydroxy-3-(((2R,4S,5R,6R)-5-hydroxy-4-methoxy-6-methyltetrahydro-2H-pyran-2-yl)oxy)-13-methyl-17-(5-oxo-2,5-dihydrofuran-3-yl)tetradecahydro-6H-5,10-(epoxymethano)cyclopenta[a]phenanthren-18-one