[EN] EVOLUTION OF BIOACTIVE SEQUENCE-DEFINED SYNTHETIC POLYMERS USING DNA-TEMPLATED POLYMERIZATION [FR] ÉVOLUTION DE POLYMÈRES SYNTHÉTIQUES DÉFINIS PAR SÉQUENCE BIOACTIVE À L'AIDE D'UNE POLYMÉRISATION À MATRICE D'ADN
2‘-Deoxycytidines Carrying Amino and Thiol Functionality: Synthesis and Incorporation by Vent (Exo<sup>-</sup>) Polymerase
作者:Abhijit Roychowdhury、Heshan Illangkoon、Cynthia L. Hendrickson、Steven A. Benner
DOI:10.1021/ol0360290
日期:2004.2.1
[reaction: see text] The synthesis of 2'-deoxycytidine nucleosides bearing amino and thiol groups appended to the 5-position of the nucleobase via a butynyl linker is described. The corresponding triphosphates were then synthesized from the nucleoside and incorporated into oligonucleotides by Vent (exo(-)) DNA polymerase. The ability of Vent (exo(-)) polymerase to amplify oligonucleotides containing
Ethynyl Side Chain Hydration during Synthesis and Workup of “Clickable” Oligonucleotides: Bypassing Acetyl Group Formation by Triisopropylsilyl Protection
作者:Sachin A. Ingale、Hui Mei、Peter Leonard、Frank Seela
DOI:10.1021/jo401780u
日期:2013.11.15
ethdU) or the 7-position of 7-deazaguanine (ethc7Gd) are hydrated during solid-phase oligonucleotide synthesis and workup conditions. The side products were identified as acetyl derivatives by MALDI-TOF mass spectra of oligonucleotides and by detection of modified nucleosides after enzymatic phosphodiester hydrolysis. Ethynyl → acetylgroup conversion was also studied on ethynylated nucleosides under acidic
在嘧啶的5位(eth dC和eth dU)或7-脱氮鸟嘌呤(eth c 7 G d)的7位具有乙炔基残基的可点击寡核苷酸在固相寡核苷酸合成和后处理条件下水合)。通过寡核苷酸的MALDI-TOF质谱和通过酶促磷酸二酯水解后检测修饰的核苷,将副产物鉴定为乙酰基衍生物。还研究了在酸性和碱性条件下乙炔基核苷的乙炔基→乙酰基转化。可以证明侧链转化取决于核碱基的结构。引入三异丙基甲硅烷基残基以保护乙炔基残基免于水合。在所有情况下,经过去甲硅烷基化后,分离出无乙酰基的纯净寡核苷酸。
Functionalized Silver‐Ion‐Mediated α‐dC/β‐dC Hybrid Base Pairs with Exceptional Stability: α‐<scp>d</scp>‐5‐Iodo‐2′‐Deoxycytidine and Its Octadiynyl Derivative in Metal DNA
作者:Sebastian Lars Müller、Xinglong Zhou、Peter Leonard、Oxana Korzhenko、Constantin Daniliuc、Frank Seela
DOI:10.1002/chem.201805299
日期:——
Silver‐mediated α‐dC–Ag+–β‐dC hybrid basepairs decorated with 5‐iodo‐ or 5‐octadiynyl residues are well accommodated in duplex DNA. A strong Tm increase and favorable thermodynamic data for duplex DNA were observed after addition of silver ions. The phenomenon is particularly obvious when both nucleobases of the basepairs are functionalized. Neither the position of the basepair, nor the type of
用5-碘或5-辛二炔基残基修饰的银介导的α-dC-Ag + -β-dC杂合碱基对在双链体DNA中具有很好的适应性。添加银离子后,观察到双链DNA的T m强烈增加,热力学数据良好。当碱基对的两个核碱基都被官能化时,该现象尤其明显。碱基对的位置或5位取代基的类型都没有负面影响。相反,常规的银介导的β-dC-Ag +的功能化–β‐dC同源碱基对显示出巨大的取代基所产生的负面影响。为此,使用新的α-异头2'-脱氧胞苷亚磷酰胺通过固相合成制备了胞嘧啶修饰的12-mer寡脱氧核苷酸。针对5-碘-α- d -2-2'-脱氧胞苷(1)进行了多克级合成,采用胞嘧啶与Hoffer的α- d-卤代糖直接糖基化,然后分离端粒的DMT核苷进行了合成。关于碱基对的稳定性和功能化,发现银介导的α/β-dC杂合碱基对优于β/β-dC同源对。根据其非凡的特性,他们可能会在DNA诊断,材料科学或纳米技术中找到应用。
Ferrocene-modified pyrimidine nucleosides: synthesis, structure and electrochemistry
This paper reports syntheses, crystal structures and electrochemical results for two ferrocene(Fc)-modified pyrimidine nucleosides that could potentially be used for investigating electron transfer in DNA. Fc was directly attached to the 5-position of deoxyuridine and deoxycytidine via the Stille coupling reaction. Fc-modified uridine was incorporated into DNA trinucleotides with standard solid-phase synthesis. The structures of corresponding detritylated compounds were determined by single-crystal X-ray analysis. Electrochemical investigations of all compounds by cyclic voltammetry revealed reversible redox processes.
本文报告了两种二茂铁(Fc)修饰的嘧啶核苷的合成、晶体结构和电化学结果,这些核苷可用于研究 DNA 中的电子传递。Fc 通过 Stille 偶联反应直接连接到脱氧尿苷和脱氧胞苷的 5 位。通过标准固相合成法将 Fc 修饰的尿苷并入 DNA 三核苷酸。通过单晶 X 射线分析确定了相应的脱三苯甲基化合物的结构。通过循环伏安法对所有化合物进行的电化学研究显示了可逆的氧化还原过程。