hylphenyl)pentaerythritol, derivatized with 5′-O-(4,4′-dimethoxytrityl)-3′-O-4-[2-(but-3-yn-1-ylamino)-2-oxoethoxy]phenoxyacetyl}thymidine, was used as a soluble support to assemble fully protected 2′-O-deoxyribonucleotide trimers by the phosphotriester chemistry. After the coupling and detritylation steps, the support-bound construct was purified by precipitation in MeOH. The trimers (TAT, AGT, TTA
四ø - (4-偶氮)
季戊四醇,用5'-衍生ø - (4,4'-二甲氧基三苯甲基)-3'- ø - 4- [2-(丁-3-炔-1-基
氨基) - 2-氧乙氧基]苯氧基乙酰基}
胸苷被用作可溶性载体,以通过
磷酸三酯
化学组装完全保护的2'- O-脱氧
核糖核苷酸三聚体。在偶联和去三苯甲基化步骤之后,通过在MeOH中沉淀来纯化与载体结合的构建体。完全保护的三聚体(TAT,AGT,
TTA,CAT,GCT)通过用稀
甲醇K 2 CO 3处理而释放。并通过短
硅胶柱过滤,总产率为65-70%。将以0.5 mmol规模制备的两个三聚体(CAT和GCT)转化为相应的亚
磷酰胺。事实证明,制备三聚亚
磷酰胺的整个过程是直接的,可用于大规模合成。