(22S,25R)-2α,3α,16β-trihydroxy-22,26-epimino-5α-cholestan-6-one 在
N-氯代丁二酰亚胺 作用下,
以
甲醇 、
氯仿 为溶剂,
以97%的产率得到(2R,3S,5S,8R,9S,10R,13S,14S,16S,17R)-17-[(S)-1-((2S,5R)-1-Chloro-5-methyl-piperidin-2-yl)-ethyl]-2,3,16-trihydroxy-10,13-dimethyl-hexadecahydro-cyclopenta[a]phenanthren-6-one