A novel phosphotriesterified ribonucleic acid compound which is important for liquid-phase synthesis of oligo-RNA is provided.
Examples of the ribonucleic acid compound of the invention may include ribonucleic acid compounds represented by the following general formula:
(wherein B represents adenine, guanine, cytosine or uracil or a modified form thereof; R
21
represents aryl which may be substituted or a monocyclic or bicyclic heterocyclic group which may be substituted; R
20
represents H or alkyl which may be substituted; and R
1
represents a protecting group which can be removed at 90% or more at a temperature in the range from 0° C. to 60° C. under acidic conditions at a pH value from 2 to 4 within 24 hours).
本发明提供了一种新型的
磷酸三酯化
核糖核酸化合物,对于寡核苷酸的液相合成非常重要。本发明的
核糖核酸化合物的例子可能包括以下通式所代表的
核糖核酸化合物:(其中B代表
腺嘌呤、
鸟嘌呤、
胞嘧啶或尿
嘧啶或其修饰形式;R21代表可以被取代的芳基或可以被取代的单环或双环杂环基团;R20代表氢或可以被取代的烷基;R1代表保护基,在pH值为2至4的酸性条件下,在24小时内在0℃至60℃的温度范围内可以去除90%或更多的保护基)。