The present invention pertains to a method for synthesizing a ribonucleic acid H-phosphonate monomer, and a method for performing oligonucleotide synthesis in which said monomer is used. The present invention pertains to a method for manufacturing an inexpensively manufacturable H-phosphonate nucleoside derivative in which selective protection is provided to position 2′ of a ribonucleoside monomer required in RNA oligonucleotide synthesis. The present invention is characterized in that: hydroxyl groups in position 2′ and position 3′, which have slightly different reactivity, are caused to react with an aromatic acyl halide at low temperature to selectively esterify position 2′; and subsequently the hydroxyl group at position 3′ in one pot is captured by a phosphityl group to prevent position 2′ and position 3′ transfer of the acyl group.
本发明涉及一种合成
核糖核酸H-
膦酸酯单体的方法,以及一种在其中使用该单体的寡核苷酸合成方法。本发明涉及一种制造成本低廉的H-
膦酸酯核苷衍
生物的方法,其中对
核糖核苷单体的2′位提供选择性保护,该单体在RNA寡核苷酸合成中所需。本发明的特点在于:在低温下使2′位和3′位的羟基(其反应性略有不同)与芳香
酰卤反应,选择性地酯化2′位;随后,在同一反应容器中,通过
磷酸酯基捕获3′位的羟基,以防止酰基的2′位和3′位转移。