2-S-(5'-deoxy-3'-O-tert-butyldiphenylsilyl-2'-O,4'-C-methylenethymidin-5'-yl)mercaptoacetic acid 、
3'-amino-3'-deoxy-5'-O-DMT-2'-O-4'-C-methylenethymidine 在
1-羟基苯并三唑 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 4.25h,
以62%的产率得到1-(3'-deoxy-5'-O-DMT-2'-O,4'-C-methylenethymidin-3'-yl)-4-(5"-deoxy-3"-O-tert-butyldiphenylsilyl-2"-O,4"-C-methylene-thymidin-5"-yl)mercaptoacetamide