5α,6α-epoxycholest-7-en-3β-ol 、
N1,N4-双-Boc-亚精胺 在
lithium perchlorate 作用下,
以
乙醇 为溶剂,
反应 96.0h,
以48%的产率得到tert-butyl N-[4-[[(3S,5R,6R,9S,10R,13R,14R,17R)-3,5-dihydroxy-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-1,2,3,4,6,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-6-yl]amino]butyl]-N-[3-[(2-methylpropan-2-yl)oxycarbonylamino]propyl]carbamate