17α-hydroxy-3,11,20-trioxo-pregnadien-(1,4)-yl-(21)-2-trifluoracetamido-2-deoxy- 3,4,6-tri-O-acetyl-D-glucopyranoside 、
乙酸酐 在
sodium acetate 作用下,
以
甲醇 、
四氢呋喃 为溶剂,
反应 8.0h,
以15%的产率得到N-((2R,3R,4R,5S,6R)-4,5-dihydroxy-2-(2-((8S,9S,10R,13S,14S,17R)-17-hydroxy-10,13-dimethyl-3,11-dioxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxoethoxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3-yl)acetamide