三氧化硫吡啶 、 5-cholestene-3β,19-diol 19-monoacetate 以
氯仿 为溶剂,
反应 4.0h,
以85%的产率得到Acetic acid 17-((R)-1,5-dimethyl-hexyl)-13-methyl-3-sulfooxy-1,2,3,4,7,8,9,11,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-10-ylmethyl ester; compound with pyridine