sodium (20R,24S)-3β,4β,7α,8,15β,24-hexahydroxy-5α-cholestan-6α-yl sulfate 在
吡啶 作用下,
以
1,4-二氧六环 为溶剂,
反应 5.0h,
以0.5 g的产率得到(3S,4R,5R,6R,7R,8S,9R,10S,13R,14S,15R,17R)-17-((2R,5S)-5-hydroxy-6-methylheptan-2-yl)-10,13-dimethylhexadecahydro-8H-cyclopenta[a]phenanthrene-3,4,6,7,8,15-hexaol