ethyl 2-O-[(5S,8R,9S,10S,13S,14S,17S)-3-(dimethylsilyloxy)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthren-17-ol]-3,4,6-tri-O-benzyl-1-thio-α-D-mannopyranoside 在
N-碘代丁二酰亚胺 、
2,6-二叔丁基-4-甲基吡啶 、
三氟甲磺酸三甲基硅酯 、
四丁基氟化铵 作用下,
以
二氯甲烷 、
四氢呋喃 为溶剂,
生成
3-(3R,5S,8R,9S,10S,13S,14S,17S)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene-17-ol-3,4,6-tri-O-benzyl-β-D-mannopyranoside 、 3-(3S,5S,8R,9S,10S,13S,14S,17S)-10,13-dimethylhexadecahydro-1H-cyclopenta[a]phenanthrene-17-ol-3,4,6-tri-O-benzyl-β-D-mannopyranoside