The purpose of the present invention is therefore to provide a method for binding a 3'-end nucleoside unit comprising any base to a hydroxyl group on a solid-phase support under completely the same condition as in DNA chain elongation reaction. The present invention relates to a 3' -end nucleoside unit comprising phosphoramidite that is a compound represented by the following formula:
(N)-O-(R1)Si(R2)-(C6H4)-(CH2)n-O-P(OR3)N(R4) (R5) (I)
wherein (N) represents any nucleoside or its derivative, each of R1, R2, R4 and R5 is an alkyl or aryl group, R3 is a phosphate-protecting group, and n is an integer of from 1 to 5; a solid-phase support having said 3'-end nucleoside unit ; and a method for the synthesis of a nucleic acid oligomer with the use of said solid-phase support.
因此,本发明的目的是提供一种方法,在与 DNA 链延伸反应完全相同的条件下,将包含任何碱基的 3'端核苷单元与固相支持物上的羟基结合。本发明涉及一种包含亚
磷酰胺的 3'端核苷单元,亚
磷酰胺是由下式表示的化合物:
(N)-O-(R1)Si(R2)-(
C6H4)-(
CH2)n-O-P(OR3)N(R4) (R5) (I)
其中 (N) 代表任何核苷或其衍
生物,R1、R2、R4 和 R5 各为烷基或芳基,R3 为
磷酸盐保护基团,n 为 1 至 5 的整数;具有所述 3'- 端核苷单元的固相支持物;以及使用所述固相支持物合成核酸寡聚体的方法。