Solution-Phase Synthesis of Branched DNA Hybrids Based on Dimer Phosphoramidites and Phenolic or Nucleosidic Cores
作者:Helmut Griesser、Mariyan Tolev、Arunoday Singh、Thomas Sabirov、Claudia Gerlach、Clemens Richert
DOI:10.1021/jo202505h
日期:2012.3.16
Branched oligonucleotides with “CG zippers” as DNA arms assemble into materials from micromolar solutions. Their synthesis has been complicated by low yields in solid-phase syntheses. Here we present a solution-phase synthesis based on phosphoramidites of dimers and phenolic cores that produces six-arm or four-arm hybrids in up to 61% yield. On the level of hybrids, only the final product has to be
DNA臂上带有“ CG拉链”的分支寡核苷酸从微摩尔溶液中组装成材料。它们的合成由于固相合成中的低产率而变得复杂。在这里,我们提出了一种基于二聚体和酚核的亚磷酰胺的溶液相合成方法,该方法可产生六臂或四臂杂化体,产率高达61%。在杂种水平上,仅需通过沉淀或色谱法纯化最终产物。通过固溶相途径共制备了五种不同的杂种,包括新杂种(TCG)4具有四(三唑基苯基)金刚烷核心和三聚体DNA臂的TTPA。该新方法比固相合成更容易扩大规模,每酚醇使用不超过4当量的亚磷酰胺,并提供常规途径通过可预测的碱基配对相互作用组装的新型材料。