2'-O-(2-cyanoethyl)-3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)adenosine | 910309-81-8

• 分子结构分类: 有机化合物 - 核苷、核苷酸和类似物 - 嘌呤核苷
• 英文名称: 2'-O-(2-cyanoethyl)-3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)adenosine
• 英文别名: 2'-O-cyanoethyl-3',5'-O-(tetraisopropyldisiloxane-1,3-diyl)-adenosine；3-[[(6aR,8R,9R,9aR)-8-(6-aminopurin-9-yl)-2,2,4,4-tetra(propan-2-yl)-6a,8,9,9a-tetrahydro-6H-furo[3,2-f][1,3,5,2,4]trioxadisilocin-9-yl]oxy]propanenitrile
• CAS: 910309-81-8
• 化学式: C₂₅H₄₂N₆O₅Si₂
• 分子量: 562.817
• InChiKey: SZMSSAPFPFIEFG-PTGPVQHPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.56
• 重原子数：
  38
• 可旋转键数：
  8
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.76
• 拓扑面积：
  140
• 氢给体数：
  1
• 氢受体数：
  10

反应信息

• 作为反应物：
  描述：

  2'-O-(2-cyanoethyl)-3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)adenosine 在 吡啶 、 4,5-二氰基咪唑 、 氨 、 氢气 、 triethylamine tris(hydrogen fluoride) 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 20.0 ℃ 、3.0 MPa 条件下， 反应 11.5h， 生成 N6-dimethylaminomethylene-2'-O-(N,N'-di-Boc-guanidinopropyl)-5'-O-(4,4'-dimethoxytrityl)-adenosine 3'-(cyanoethyl)-N,N-diisopropyl phosphoramidite
  参考文献：
  名称：

  Synthesis of 2′-O-guanidinopropyl-modified nucleoside phosphoramidites and their incorporation into siRNAs targeting hepatitis B virus

  摘要：

  Synthetic RNAi activators have shown considerable potential for therapeutic application to silencing of pathology-causing genes. Typically these exogenous RNAi activators comprise duplex RNA of approximately 21 bp with 2 nt overhangs at the 3' ends. To improve efficacy of siRNAs, chemical modification at the 2'-OH group of ribose has been employed. Enhanced stability, gene silencing and attenuated immunostimulation have been demonstrated using this approach. Although promising, efficient and controlled delivery of highly negatively charged nucleic acid gene silencers remains problematic. To assess the potential utility of introducing positively charged groups at the 2' position, our investigations aimed at assessing efficacy of novel siRNAs containing 2'-O-guanidinopropyl (GP) moieties. We describe the formation of all four GP-modified nucleosides using the synthesis sequence of Michael addition with acrylonitrile followed by Raney-Ni reduction and guanidinylation. These precursors were used successfully to generate antihepatitis B virus (HBV) siRNAs. Testing in a cell culture model of viral replication demonstrated that the GP modifications improved silencing. Moreover, thermodynamic stability was not affected by the GP moieties and their introduction into each position of the seed region of the siRNA guide strand did not alter the silencing efficacy of the intended HBV target. These results demonstrate that modification of siRNAs with GP groups confers properties that may be useful for advancing therapeutic application of synthetic RNAi activators. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2011.12.024
• 作为产物：
  描述：

  N6-dimethylaminomethylene-3',5'-O-(tetraisopropyldisiloxane-1,3-diyl)-adenosine 在 caesium carbonate 、 一水合肼 作用下， 以 甲醇 、 叔丁醇 为溶剂， 反应 6.0h， 生成 2'-O-(2-cyanoethyl)-3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl)adenosine
  参考文献：
  名称：

  Synthesis of 2′-O-guanidinopropyl-modified nucleoside phosphoramidites and their incorporation into siRNAs targeting hepatitis B virus

  摘要：

  Synthetic RNAi activators have shown considerable potential for therapeutic application to silencing of pathology-causing genes. Typically these exogenous RNAi activators comprise duplex RNA of approximately 21 bp with 2 nt overhangs at the 3' ends. To improve efficacy of siRNAs, chemical modification at the 2'-OH group of ribose has been employed. Enhanced stability, gene silencing and attenuated immunostimulation have been demonstrated using this approach. Although promising, efficient and controlled delivery of highly negatively charged nucleic acid gene silencers remains problematic. To assess the potential utility of introducing positively charged groups at the 2' position, our investigations aimed at assessing efficacy of novel siRNAs containing 2'-O-guanidinopropyl (GP) moieties. We describe the formation of all four GP-modified nucleosides using the synthesis sequence of Michael addition with acrylonitrile followed by Raney-Ni reduction and guanidinylation. These precursors were used successfully to generate antihepatitis B virus (HBV) siRNAs. Testing in a cell culture model of viral replication demonstrated that the GP modifications improved silencing. Moreover, thermodynamic stability was not affected by the GP moieties and their introduction into each position of the seed region of the siRNA guide strand did not alter the silencing efficacy of the intended HBV target. These results demonstrate that modification of siRNAs with GP groups confers properties that may be useful for advancing therapeutic application of synthetic RNAi activators. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2011.12.024

文献信息

• Chemical synthesis of RNA via 2′-O-cyanoethylated intermediates
  作者：Hisao Saneyoshi、Kaori Ando、Kohji Seio、Mitsuo Sekine

  DOI：10.1016/j.tet.2007.07.102

  日期：2007.11

  could be removed from 2′-O-cyanoethylated ribonucleoside derivatives by treatment with Bu4NF. This finding was successfully applied to the synthesis of oligoribonucleotides via their 2′-O-cyanoethylated derivatives as key intermediates where a cyanoethyl group was used as the 2′-hydroxyl protecting group. The rate of condensation using this protecting group in the presence of various activators was generally

  发现通过用Bu 4 NF处理可以从2'- O-氰基乙基化的核糖核苷衍生物中除去2'- O-氰基乙基。该发现通过其2'- O-氰基乙基化衍生物作为关键中间体成功地应用于寡核糖核苷酸的合成，其中氰基乙基被用作2'-羟基保护基。在各种活化剂存在下，使用该保护基的缩合速率通常比将TBDMS基团用作保护基时观察到的速率要快。
• Synthesis and hybridization properties of 2′-O-(tetrazol-5-yl)ethyl-modified oligonucleotides
  作者：Hisao Saneyoshi、Keigo Tamaki、Akihiro Ohkubo、Kohji Seio、Mitsuo Sekine

  DOI：10.1016/j.tet.2008.02.075

  日期：2008.5

  l)ethyl modifications exhibited intriguing properties such as the change in the structure of the tetrazole residue between a protonated and a deprotonated form. The Tm experiments of various oligodeoxynucleotides having a 2′-O-(1H-tetrazol-5-yl)ethyl-modified adenosine showed reduced hybridization affinity in comparison to the unmodified oligonucleotides toward their complementary oligodeoxynucleotides

  2'- ø - （1 ħ -四唑-5-基）乙基腺苷用2'-合成ö -cyanoethyladenosine衍生物作为关键中间体。2'- O-（1H-四唑-5-基）乙基修饰物表现出令人感兴趣的性质，例如在质子化形式和去质子化形式之间四唑残基的结构变化。所述Ť米具有2'-各种寡核苷酸的实验ø - （1个ħ与未修饰的寡核苷酸相比，对-四唑-5-基）乙基修饰的腺苷显示出降低的杂交亲和力，其互补的寡聚脱氧核苷酸。在四唑部分的结构和理化性质的基础上，探讨了降低杂交亲和力的机理。
• Synthesis of 2′-O-guanidinopropyl-modified nucleoside phosphoramidites and their incorporation into siRNAs targeting hepatitis B virus
  作者：Jolanta Brzezinska、Jennifer D’Onofrio、Maximilian C.R. Buff、Justin Hean、Abdullah Ely、Musa Marimani、Patrick Arbuthnot、Joachim W. Engels

  DOI：10.1016/j.bmc.2011.12.024

  日期：2012.2

  Synthetic RNAi activators have shown considerable potential for therapeutic application to silencing of pathology-causing genes. Typically these exogenous RNAi activators comprise duplex RNA of approximately 21 bp with 2 nt overhangs at the 3' ends. To improve efficacy of siRNAs, chemical modification at the 2'-OH group of ribose has been employed. Enhanced stability, gene silencing and attenuated immunostimulation have been demonstrated using this approach. Although promising, efficient and controlled delivery of highly negatively charged nucleic acid gene silencers remains problematic. To assess the potential utility of introducing positively charged groups at the 2' position, our investigations aimed at assessing efficacy of novel siRNAs containing 2'-O-guanidinopropyl (GP) moieties. We describe the formation of all four GP-modified nucleosides using the synthesis sequence of Michael addition with acrylonitrile followed by Raney-Ni reduction and guanidinylation. These precursors were used successfully to generate antihepatitis B virus (HBV) siRNAs. Testing in a cell culture model of viral replication demonstrated that the GP modifications improved silencing. Moreover, thermodynamic stability was not affected by the GP moieties and their introduction into each position of the seed region of the siRNA guide strand did not alter the silencing efficacy of the intended HBV target. These results demonstrate that modification of siRNAs with GP groups confers properties that may be useful for advancing therapeutic application of synthetic RNAi activators. (C) 2011 Elsevier Ltd. All rights reserved.