3-[(13S,15R)-3-hydroxy-13-methyl-17-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-15-yl]-N-(5-methyl-1,3-thiazol-2-yl)propanamide 在
N-溴代丁二酰亚胺(NBS) 作用下,
以
二氯甲烷 为溶剂,
反应 2.5h,
以1.2 g的产率得到3-((13S,15R)-2,4-dibromo-3-hydroxy-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-15-yl)-N-(5-methylthiazol-2-yl)propanamide