An object of the present invention is to provide a useful and novel phosphoramidite compound for the synthesis of oligo-RNA.
A phosphoramidite compound represented by general formula (1),
wherein:
BX represents a nucleobase optionally having a protecting group; and
R1 is a substituent represented by general formula (2),
wherein:
R11, R12 and R13 are the same or different and each represents hydrogen or alkoxy;
R2a and R2b are the same or different and each represents alkyl, or R2a and R2b taken together with the adjacent nitrogen atom may form a 5- to 6-membered saturated amino cyclic group, the amino cyclic group optionally having an oxygen or sulfur atom as a ring-composing member in addition to the adjacent nitrogen atom; and
WG1 and WG2 are the same or different and each represents an electron-withdrawing group.
                            本发明的目的是提供一种用于合成寡核苷酸的有用和新颖的
磷酰胺酯化合物。一种由通式(1)表示的
磷酰胺酯化合物,其中:BX代表一个核苷碱,可选地具有保护基;而R1是一个由通式(2)表示的取代基,其中:R11、R12和R13相同或不同,每个代表氢或烷氧基;R2a和R2b相同或不同,每个代表烷基,或者R2a和R2b与相邻的氮原子一起形成一个5-至6-成员饱和
氨基环族,该
氨基环族可选地具有一个氧或
硫原子作为环成员,除了相邻的氮原子之外;而WG1和WG2相同或不同,每个代表一个电子吸引基团。