4-(2,3-dimethylphenoxy)butyric acid ethyl ester 、
(1S,5R,6R)-5-hydroxy-N-(2-hydroxyethyl)-7-oxa-bicyclo[4.1.0]hept-3-ene-3-carboxamide 在
benzotriazol-1-yloxyl-tris-(pyrrolidino)-phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N-甲基吡咯烷酮 为溶剂,
反应 24.5h,
以91%的产率得到(3R,4S,5R)-2-(6-amino-2-hydrazinylpurin-9-yl)-5-(hydroxymethyl)oxolane-3,4-diol