Oligonucleotides with 2′-O-carboxymethyl group: synthesis and 2′-conjugation via amide bond formation on solid phase
作者:Anna Kachalova、Eugeny Zubin、Dmitry Stetsenko、Michael Gait、Tatiana Oretskaya
DOI:10.1039/b409496d
日期:——
method for synthesis of oligonucleotide 2'-conjugates via amide bond formation on solid phase is described. Protected oligonucleotides containing a 2'-O-carboxymethyl group were obtained by use of a novel uridine 3'phosphoramidite, where the carboxylic acid moiety was introduced as its allyl ester. This protecting group is stable to the conditions used in solid-phase oligonucleotide assembly, but easily
描述了通过在固相上形成酰胺键来合成寡核苷酸2'-缀合物的有效方法。通过使用新型的尿苷3'亚磷酰胺获得了含有2'-O-羧甲基的受保护的寡核苷酸,其中羧酸部分作为烯丙基酯被引入。该保护基对固相寡核苷酸组装中使用的条件稳定,但易于通过Pd(0)和吗啉处理除去。然后在正常的肽偶联条件下,将2'-O-羧甲基化的寡核苷酸有效地缀合在固体支持物上,与各种胺或小肽的N-末端结合,从而以高收率得到高纯度的产物。该方法原则上非常适合于制备在2'之间包含酰胺键的肽-寡核苷酸缀合物