乙酸酐 、 (3S,5S,8S,10S,13S,14S,17S)-3-Hydroxy-17-(1-hydroxy-1,5-dimethyl-3-oxo-hexyl)-10,13-dimethyl-1,2,3,4,5,7,8,10,12,13,14,15,16,17-tetradecahydro-cyclopenta[a]phenanthren-6-one 以
吡啶 为溶剂,
反应 4.0h,
生成
3β-Acetoxy-20ξ-hydroxy-5α-cholest-9(11)-en-6,23-dion