申请人:Hirai Kunihiro
公开号:US09029528B2
公开(公告)日:2015-05-12
A method of producing an n+p-mer oligonucleotide efficiently in a high yield, which includes use of, as a starting material, an n-mer oligonucleotide wherein the 3′-terminal hydroxyl group is protected, and the 5′-terminal hydroxyl group is protected by a temporary protecting group, and continuously performing, in a solution, (1) a deprotection step of the 5′-terminal hydroxyl group, (2) a 5′-terminal elongation step by the addition of a p-mer oligonucleotide wherein the 3′-position is phosphoramidited, and (3) an oxidation step or a sulfurization step of a phosphite triester moiety. The 3′-hydroxyl group of the n-mer oligonucleotide is protected by a solubilizing protecting group represented by formula: -L-Y—Z, where L is a group represented by formula (a1):
Y is an oxygen atom, or NR wherein R is a hydrogen atom, an alkyl group or an aralkyl group, and Z is a group represented by formula (a2):
一种高产率、高效地生产n+p-mer寡核苷酸的方法,包括使用n-mer寡核苷酸作为起始材料,其中3'-端羟基团被保护,5'-端羟基团被暂时保护基保护,并持续在溶液中执行以下步骤:(1)去除5'-端羟基团的保护基,(2)通过添加3'-位置为磷酰胺化的p-mer寡核苷酸进行5'-端延伸步骤,以及(3)氧化或硫化磷酸三酯基团的步骤。n-mer寡核苷酸的3'-羟基团被表示为公式-L-Y—Z的可溶性保护基所保护,其中L是由公式(a1)表示的基团:Y是氧原子,或NR,其中R是氢原子、烷基或芳基烷基,而Z是由公式(a2)表示的基团: