(3S,8S,9S,10R,13R,14S,17R)-17-[(2R)-5-amino-6-methylheptan-2-yl]-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-ol 在
pyridine-SO3 complex 作用下,
以
氯仿 为溶剂,
反应 3.0h,
以89%的产率得到[(6R)-6-[(3S,8S,9S,10R,13R,14S,17R)-3-hydroxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-2-methylheptan-3-yl]sulfamic acid