reaction could be realized only with oligomers containing up to 8 unprotected nucleotide building blocks (Schemes 3 and 4). With the analogous polymer-bound and protected oligonucleotide derivatives as amino nucleophiles, excellent yields were obtained with all chain lengths tested (up to 15mer Scheme 5), The products were purified by reversed-phase HPLC and characterized by MALDI-TOF mass spectrometry
                                    在5'端带有NH 2而不是OH的寡核苷酸衍
生物的存在下,对Z-A
LA-OH和Z-A
LA-A
LA-OH衍生的重
氮酮2和4进行光解和Ag-
苯甲酸酯催化分解基或
氨基己基
磷酸酯基团导致Z-保护的3-
氨基丁酰基和到Z-A
LA-β-哈拉衍
生物,分别为(缀合物12,13,和17 - 23,方案3-5),在溶液中,此酰胺仅使用包含多达8个未保护的核苷酸结构单元的寡聚物才能实现形成酰化反应的反应(方案3和4)。与
氨基亲核体的类似聚合物结合和保护的寡核苷酸衍
生物,用测试(高达15聚体的所有链长度得到良好的产率方案5),将产物通过反相HPLC纯化,并通过MALDI-TOF质谱法(图图2-4,表2)和通过毛细管凝胶电泳(图2)。