described. We demonstrated in this paper that a regioselective 2'-O-silylation, through a 3',5'-O-di-tert-butylsilanediyl protection, has been applied for the synthesis of [1'-13C]ribonucleoside phosphoramidite units. This method allowed us to obtain only the desired 2'-O-silyl-3'-O-phosphoramidites avoiding the undesired 3'-O-silyl-2'-O-phosphoramidite nucleosides isolated by standard procedures. This is
描述了具有区域异构体纯度的完全保护的标记的
二异丙基氨基-β-
氰基乙基-[1'-13C]
核糖核苷亚
磷酰胺的制备。我们在本文中证明了通过3',5'-O-二叔丁基
硅烷二基保护的区域选择性2'-O-甲
硅烷基化反应已用于[1'-13C]
核糖核苷亚
磷酰胺单元的合成。该方法使我们仅获得所需的2'-O-甲
硅烷基-3'-O-亚
磷酰胺,避免了通过标准程序分离的不希望的3'-O-甲
硅烷基-2'-O-亚
磷酰胺核苷。相对于含同位素的前体,这是RNA前体的合适方法。