12,21-dihydroxy-1-oxowitha-2,5,24-trienolide-27-O-β-D-glucopyranoside 在
盐酸 作用下,
以
1,4-二氧六环 、
水 为溶剂,
反应 5.0h,
以40%的产率得到(2R)-2-[(1R)-2-hydroxy-1-[(8S,9S,10R,12R,13S,14S,17R)-12-hydroxy-10,13-dimethyl-1-oxo-4,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-17-yl]ethyl]-5-(hydroxymethyl)-4-methyl-2,3-dihydropyran-6-one