(S)-1-methyl-5-(3-pyridil)pyrrolidin-2-selenone 、
石胆酸 以
甲醇 为溶剂,
反应 12.0h,
以88%的产率得到(4R)-4-[(3R,5R,8R,9S,10S,13R,14S,17R)-3-hydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoate;(5S)-1-methyl-5-pyridin-1-ium-3-ylpyrrolidine-2-selone