Uranyl ion catalyzes the polymerization of adenosine-5′-phosphorimidazolide very efficiently in aqueous solution. Up to 95% of the input adenosine-5′-phosphorimidazolide is converted to oligoadenylates from dimer to hexadecamer when 1 mM of UO22+ is used as a catalyst. The oligomeric products are predominantly 2′–5′ linked. The chain length and the regioselectivity of the resulting oligoadenylates varies greatly with the concentration of the UO22+ ion catalyst and the pH of the reaction medium. A high total yield of oligouridylates up to dodecamer is also obtained by UO22+ ion catalyst with high 2′–5′ regioselectivity. The oligonucleotide formation is mediated by UO22+-nucleotide complex.
铀酰离子在
水性溶液中能够非常有效地催化
腺苷-5′-
磷酸咪唑的聚合。当使用1 mM UO22+作为催化剂时,多达95%的输入
腺苷-5′-
磷酸咪唑从二聚体转化为十六聚体的寡
腺苷酸。寡聚产物主要是2′–5′连接的。寡
腺苷酸的链长和位点选择性随UO22+离子催化剂的浓度和反应介质的pH值而变化。UO22+离子催化剂具有较高的2′–5′位点选择性,也能获得高达十二聚体的寡
尿苷酸的高总产量。寡核苷酸的形成由UO22+核苷酸复合物介导。