三氟乙酰三氟甲磺酸酯 、
3β-acetoxy-12β-benzoyloxy-5α-furostan-14,26-diene 以
二氯甲烷 为溶剂,
反应 2.5h,
以70%的产率得到(3S,5S,8R,9S,10S,12R,13S)-3-acetoxy-10,13-dimethyl-17-((2S,3R)-6-methyl-3-(2,2,2-trifluoroacetoxy)hept-5-en-2-yl)-2,3,4,5,6,7,8,9,10,11,12,13-dodecahydro-1H-cyclopenta[a]phenanthren-12-yl benzoate