申请人:——
公开号:US05808035A1
公开(公告)日:1998-09-15
The present invention relates to a nucleoside having the formula: ##STR1## where R.sub.1 is a hydrogen or a protecting group; R.sub.2 is a hydrogen or a coupling group; R.sub.3 and R.sub.4 are each either a hydrogen or an alkyl group, where R.sub.3 and R.sub.4 can be connected in a ring; R.sub.5 is a hydrogen, an alkyl group, or a carboxylic ester group; R.sub.6 is a hydrogen, an alkyl group, or a carboxylic ester group; R.sub.7 is a hydrogen, a nitro group, a halogen, a cyano group, or an alkyl group, where R.sub.7 is attached at either position 4, 5 or 6; and Base is a protected heterocyclic base. Further, the present invention relates to a method of making the nucleoside and a method of oligomer synthesis utilizing the nucleoside.
本发明涉及具有以下结构式的核苷:##STR1##其中R.sub.1是氢或保护基;R.sub.2是氢或偶联基;R.sub.3和R.sub.4分别是氢或烷基,其中R.sub.3和R.sub.4可以连接成环;R.sub.5是氢、烷基或羧酸酯基;R.sub.6是氢、烷基或羧酸酯基;R.sub.7是氢、硝基、卤素、氰基或烷基,其中R.sub.7附加在位置4、5或6处;Base是受保护的杂环碱基。此外,本发明涉及制备核苷的方法以及利用该核苷进行寡聚物合成的方法。